Mitsuo Kubo

Mitsuo is some guy who harrassed Yukiko in Episode 2. Not much is known about him currently.

Biography
Supposedly, he believes himself to have had a hunchback at one point in his life. Whether he actually did is up to debate. He doesn't appear to have the best head on his shoulders.

Quotes
"Damn it! Why does nobody love me? It must be my hideous hunchback!" - Episode 2