渡くんの××が崩壊寸前

WATARI-KUN NO XX GA HOUKAI SUNZEN

ANIME

STATUS
COMPLETE
EPISODES
26
RELEASE
December 27, 2025
LENGTH
23 min

DESCRIPTION

Naoto Watari lives solely for his little sister, Suzushiro, until his chaotic childhood friend, Satsuki, storms back into his life. Without uttering a single word, her very presence ignites buried memories and unravels his rigid routine. As tensions rise and secrets surface, Naoto’s devotion to Suzushiro clashes with unresolved pain, threatening to collapse his fragile world.

(Source: Crunchyroll)

CAST

Satsuki Tachibana
Yumika Yano
Naoto Watari
Shuichirou Umeda
Suzushiro Watari
Hinaki Yano
Yukari Ishihara
Yurie Igoma
Makina Umezawa
Meg Umezawa
Tamayo Watari
Naomi Oozora
Shigenobu Tokui
Yoshiki Nakajima
Souichirou Fujioka
Yoshimasa Hosoya

EPISODES

Dubbed

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RELATED TO WATARI-KUN NO XX GA HOUKAI SUNZEN

Cover Art for Watari-kun no xx ga Houkai Sunzen

MANGA ComedyWatari-kun no xx ga Houkai Sunzen

REVIEWS

Ectoplasm
81/100
Many people might not like this anime because Watari (MC) is indecisive, but I think that’s what makes it complex.
REVIEW WITH SPOILERS

VISUALS and CHARACTERS
For a romance anime, the visuals are pretty good. The NPCs have eyes and interact with each other, which makes the world feel alive. Some scenes look a bit stiff, but not too bad. The character designs are nice too. You can really see the difference between the Ishihara and Satsuki “teams,” and it feels balanced. The main character isn’t handsome, but that’s actually a good thing his charm comes from his personality, not his looks.

STORY and DEVELOPMENT
The story is about a high school boy and his little sister who move to live with their aunt after their parents die in an accident, leaving behind their old lives and love stories, until they meet new people. The premise sounds simple, but the character portrayals are done really well. Some people might not like this anime because of its ecchi parts or because Watari (the MC) looks indecisive and inconsistent, but for me, that’s what makes it interesting. Each character’s development is clear.
- Suzu (the lil sister) starts out childish and clingy, always wanting her brother’s attention. But later, she realizes her behavior keeps her brother from enjoying his school life.
- Tokui (the best friend) at first seems to have his own agenda, but it turns out he just wants his friend to choose the right person. His views on love are shaped by his sad past, which makes his perspective unique.
- Ishihara (the classmate) likes Watari because he’s not like other guys who only care about looks. She also admires how Watari cares deeply for his sister. However, her feelings are shown in the wrong way, Ishihara wants a sexual relationship rather than emotional understanding. Even though they start dating, Watari begins to feel uncomfortable because it seems like they’re doing sex not out of love, but because Ishihara pushes him. This part becomes more meaningful when we learn that Watari is an illegitimate child. That’s why he lives in the countryside, and it also explains why he believes sex should be something serious only with someone he truly loves and is ready to take responsibility for.
- Watari (MC), he starts as a caring older brother, but then realizes he can’t stay like that forever. One day, they’ll have to live separately. This maturity makes him realize he’s allowed to love someone other than his sister. He starts to like Ishihara, but then his childhood friend reappears, and a dilemma begins, who does he truly love? What does love really mean? Is love just about sex, or something deeper? As more of his past is revealed, he learns that love isn’t just words or physical connection, but about responsibility and the will to walk forward with the right person.
- Satsuki (the childhood friend) has layered emotions. She was just a kid taken on vacation with her family, but for some reason, they left her at the inn. The inn owner adopted her, and because of her fear of being abandoned, she avoided deep relationships with others. But in the end, she realizes Watari is someone who truly accepts her as she is. Her change from not caring about who Watari dates to genuinely loving him is really touching. She also learns that her adoptive family truly loves her, not out of pity, but because they genuinely love and care.
Even so, that doesn’t mean this anime is perfect. Aside from the visuals, some characters are introduced roughly and feel like they only exist to fill the story like Abe (Satsuki’s school friend).

FAVORITE CHARACTER
My favorite is definitely Satsuki. I find her more attractive, but more than that, her emotional growth and personality make her an easy choice over Ishihara.
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chinachinku
25/100
great anime at start , downhill story at end
STORY and DEVELOPMENT
The story is about a high school boy and his little sister who move to live with their aunt after their parents die in an accident, leaving behind their old lives and love stories, until they meet new people. The premise sounds simple, but the character portrayals are done really well. Some people might not like this anime because of its ecchi parts or because Watari (the MC) looks indecisive and inconsistent, but for me, that’s what makes it interesting. Each character’s development is clear.

Suzu (the lil sister) starts out childish and clingy, always wanting her brother’s attention. But later, she realizes her behavior keeps her brother from enjoying his school life.
Tokui (the best friend) at first seems to have his own agenda, but it turns out he just wants his friend to choose the right person. His views on love are shaped by his sad past, which makes his perspective unique.
Ishihara (the classmate) likes Watari because he’s not like other guys who only care about looks. She also admires how Watari cares deeply for his sister. However, her feelings are shown in the wrong way, Ishihara wants a sexual relationship rather than emotional understanding. Even though they start dating, Watari begins to feel uncomfortable because it seems like they’re doing sex not out of love, but because Ishihara pushes him. This part becomes more meaningful when we learn that Watari is an illegitimate child. That’s why he lives in the countryside, and it also explains why he believes sex should be something serious only with someone he truly loves and is ready to take responsibility for.
Watari (MC), he starts as a caring older brother, but then realizes he can’t stay like that forever. One day, they’ll have to live separately. This maturity makes him realize he’s allowed to love someone other than his sister. He starts to like Ishihara, but then his childhood friend reappears, and a dilemma begins, who does he truly love? What does love really mean? Is love just about sex, or something deeper? As more of his past is revealed, he learns that love isn’t just words or physical connection, but about responsibility and the will to walk forward with the right person.
Satsuki (the childhood friend) has layered emotions. She was just a kid taken on vacation with her family, but for some reason, they left her at the inn. The inn owner adopted her, and because of her fear of being abandoned, she avoided deep relationships with others. But in the end, she realizes Watari is someone who truly accepts her as she is. Her change from not caring about who Watari dates to genuinely loving him is really touching. She also learns that her adoptive family truly loves her, not out of pity, but because they genuinely love and care.
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like all anime , i watched it to the very end. started out great, but then the author started dragging it out. By episode 15 i was just watching for the hell of it. Really hated the direction the romance went. I was a ISHIHARA fan from the get go , so maybe my opinion is biased. Did the author think that just because they gave Tachibana a sad back story , she would be liked as a heroine. overall i give it a 4/10,
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patkarunungan
60/100
It fails as a harem; it succeeds as a decent romance.
'Watari-kun's ** Is about to Collapse' seems to be yet another trashy harem anime. I can't blame people for why that seems to be the case, and there are a number of negative comments I see in a number of places. I really thought it was going to be a nice guilty pleasure. It turns out, it has some depth.

It's about two siblings, Watari Naoto and Watari Suzushiro, living with their aunt. Their parents, who were disowned by their respective families, died, and Nao-kun had to spend so much time with his younger sister to the detriment of having a romantick and social life. This changes when three girls who have a thing for him appear.

Its visuals don't really wow me. It's just acceptable, so I won't belabour this point.

Its director, Naoya Takashi, has been a disaster in his previous work, Übel Blatt. Not so with this anime, and he seems to have redeemed himself. Even if source readers say that it had been rushed, it doesn't feel like it from the perspective of this anime-only viewer. This is in contrast to Übel Blatt, where 1) there is so much stuff that seems omitted, and 2) you are overloaded with so much information that it disorients you.

Let's get the negative out of the way. Nao-kun's love interests have uneven character development. One is outright flat; one is flailing to keep up with the best girl; and only one person is the best girl by virtue of the fact that she is the most developed and has complex motivations regarding her behaviour. That's why, as a harem, this sucks; but as a romance, it is fairly acceptable. I don't know if the manga develops all three, but I am giving this warning, just in case this aspect might be an issue for you.

The character designs are forgettable. Nao-kun comes across initially as the typical wimp and self-insert character. It doesn't help that the girls have forgettable character designs. For some, the fanservice is too much.

Here's where I differ. The gratuitous fanservice is there to hold your interest, and boy, it did. I experience, shall we say, visual and physical stimulation from such fanservice, and this is not supposed to be ecchi like Please Put It On, Takamine-san. This anime has the trappings of an average school harem anime. But once it has your attention, it shines by its relative maturity.

To paraphrase Lucretius, the fanservice is like sweet honey that you ingest along with the bitter pill, so that you can drink the said bitter pill. The presence of fanservice, i.e., the three girls always wanting to be in his pants, is an expression of sexuality.

This anime doesn't shy away from the fact that teenagers have sexual desires, and furthermore, there are consequences when you engage in such activity. Nao-kun is a product of an unwanted pregnancy between two teenagers. Despite the option to abort him, his parents chose to keep him. They eloped and got married, much to the disappointment of their respective families.

The drama doesn't get as serious as Domestic Girlfriend, but it's there, and that's why I am scoring this as slightly above average.

Comparing this with A Couple of Cuckoos, Watari-kun is somewhat similar. Both are harems, and they have some humour. The pros of A Couple of Cuckoos include having better character designs and superior OP and ED. Season 1 in particular, that anime's visuals are great. The problem is that, if you're the type of person who doesn't enjoy the characters being silly and want to rush to any romantick development, you might hate A Couple of Cuckoos.

Not so with Watari-kun. In 26 episodes, there is a clear and satisfactory winner. You also enjoy the character growth of Nao-kun. From the typical clueless lad, he grows into someone responsible. To me, this is the reason why I find this anime satisfying. It earns fewer points for other aspects that it does not do well.

In conclusion, Watari-kun is good enough if you like fanservice balanced with the call towards maturity. It is particularly relevant for kids in high school who, I hope, will find some positive inspiration in this anime.

NOTA BENE: A grade of 6 out of 10 [or 60 out of 100 in anilist] means that I find this anime slightly above average, and I enjoyed watching it.

A 6 means a decent score and one notch above average. If you're the kind of viewer who treats anything below a 7 as irredeemable, I'd encourage a broader, more nuanced approach to rating.

My enjoyment spectrum lies from 4 to 10. If I have scored an anime below 4, I actively dislike it.
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