Kenken is a member of the three-member delinquent group together with Atsushi and Mario.

First year high school student Sakamoto isn't just cool, he's the coolest! Almost immediately after starting school, he began attracting everyone's attention. The girls love him, and most of the boys resent him. There's even a boy in the class who works as a model, but who is constantly upstaged by Sakamoto! No matter what tricks the other boys try to play on him, Sakamoto always manages to foil them with ease and grace. Though Sakamoto may seem cool and aloof, he helps others when asked, such as in the case of the boy in his class who was being constantly bullied. No matter what difficulties Sakamoto encounters, he moves through his high school life with confidence and class! 
 
(Source: MangaHelpers)

__Hobbies:__ driving, historical research

__[Weibo](https://weibo.com/1296476647) | [Bilibili](https://space.bilibili.com/242183)__

Unaired episode 13 included with the fifth Blu-ray and DVD volume. 
 
Just who is Sakamoto? He's enigmatic. He's clever. He's dashing. No challenge is too great and no cause is too small for Sakamoto. Girls love him, guys hate him for it, and despite efforts to humiliate him, Sakamoto is flawlessly able to emerge from the fray, even cooler than ever. Who knows what Sakamoto is going to do next? Whatever it is, it will be fabulous! 
 
(Source: Crunchyroll)