Yuudai Chiba
千葉 雄大
Yuudai Chiba
Gender: Male
Age: 12
Relatives: Kazumi Chiba (mother)
Other names: Chiba, Chibacchi
First Appearance(Manga): Chapter 3
First Appearance(Anime) Episode 1
Voice Actors
Japanese: Kazutomi Yamamoto

Yuudai Chiba (千葉 雄大 Chiba Yūdai) is Satou's best friend. He goes to Kamohashi Elementary and is in class 6-3.



He has short black hair and thick eyebrows. His eyes often appear to be closed. His clothes usually have some sort of sexual innuendo on them, such as a cap with a "69" on it, which he always wears; a shirt with "erection" written on it, and a jacket with the letter "H" (ecchi) on it.

Personality and InterestsEdit

Chiba is very interested in sex. He admits to being a pervert, although in the manga he is usually described as an "extremely healthy boy" for his behavior. He often invents techniques for harassing girls, although they usually don't work well in execution. In season 2, he tells Satou that, in reality, his primary motivation is to embarrass girls and not to see them naked.


Shinya SatouEdit

Chiba and Satou are best friends. Even so, Chiba is jealous of Satou's popularity with girls and likes to mess with him, while Satou is frequently annoyed by Chiba's antics.. He believes that Satou is just as much a pervert as he is, but he gets away with it because of his good looks.

Futaba MaruiEdit




  • During the title sequence of the first series, he is standing behind Hitoha during the dance, and when he catches a glimpse of the erotic book she’s reading, he suffers a spontaneous explosive nosebleed. This even has a sound effect in episode 7.
  • In a readers poll celebrating 300 issues of Mitsudomoe, he came in 13th, the highest of all the boys.