Uchi no Otouto Maji de Dekain Dakedo Mi ni Konai?

My Younger Brother is Really Big, Wanna Come See?

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Alternative Titles

Japanese: ウチの弟マジでデカイんだけど見にこない ?
English: My Younger Brother is Really Big, Wanna Come See?
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Type: OVA
Episodes: 2
Status: Finished Airing
Aired: Apr 28, 2021
Producers: Lune-Pictures
Licensors: None found, add some
Studios: T-Rex
Source: Other
Genre: HentaiHentai
Duration: 16 min. per ep.
Rating: Rx - Hentai


Score: 7.661 (scored by 1138511,385 users)
1 indicates a weighted score.
Ranked: N/A2
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #4655
Members: 22,098
Favorites: 309

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Ranked N/APopularity #4655Members 22,098
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Episodes: /2


Nao, a young preteen, is caught masturbating in the bathroom by his older teen sister Chiaki after having broken his beloved sex toy, Sakura-chan. Far from disturbed, Chiaki is surprised by the size of her younger brother's penis and takes a photo of it to share with her friends, urging them to come over to see his "Cockzilla."

The very next day, two girls named Nagisa and Yukiko arrive at Chiaki's house to look at Nao's Cockzilla. Shamelessly, Chiaki exposes her brother's body before her friends' astonished eyes while they start discussing his size. With the intention of knowing its true caliber, they engage in stimulating it beyond its limits.

[Written by MAL Rewrite]


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Characters & Voice Actors




Yasuda, Naoko


Ozaki, Miku




Honda, Pisan
Raika, Ken
Sagari, Megane


Opening Theme

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Ending Theme

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Feb 29, 2024
The animation is one of the best I've seen in years.
I was really impressed by the quality and I hope that this story could have more episodes or new stories in the future. Please do it!

The art and character design is wonderful, I'm sure that if this has a physical manga it would be a gem. I really appreciate the work TRex studio did on this.

It's a shame that it only has 2 episodes, this deserves at least 12 episodes but I understand that it is a very small story although, as I mentioned before, it is worthy of being expanded. From here I encourage ...
Dec 30, 2023
Its one of the best hanime i ever watched those glossy trex animation is on the next level and the female character design is on another caliber
Its story is also better than some of the other hanimes which have way illogical plot its one of my favoirite one. How his sister caught him masturbating and how huge his penis was, she shared the pic to her friends and how they got into intercourse with her brother by getting turned on by his so called 'cockzilla' and how in the next episodes his sister also gets adicted to his penis and joined her two friends, ...
Jul 21, 2021
Mixed Feelings
Yeah it isn’t great, this hentai started off so strong and brimming with so much quality but then the facade faded and all we’re left with in generic hentai goop. I watched this hentai because of a fucking meme but it should not have been as bad as it was, it was a legit slap in my goddamn face and I’m still angry about it. This is basically that clickbait YouTube video that actually starts off well but they try to fill in the last 10 minutes with filler so they can put in more bullshit ads. The main character becomes this unlikeable asshole and ...


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