Sakamoto is not a normal high schooler. He’s smart, he’s dashing, he’s popular with girls. Much to the dislike of the male population of his school, who tries every trick in the book to mess Sakamoto up. But in the end, Sakamoto comes out of every trap with style and makes himself look cooler. Does he do this for popularity? Is this just who he is? No one really knows, but haven’t you heard? He’s Sakamoto!

[Source: Crunchyroll]

Unaired episode 13 of Haven't You Heard? I was Sakamoto.