|Shitara Seiji設楽 聖司A|
|Measurements||Height: 170cm, Weight: 53kg|
|Hair||Grey, Short, Wavy|
|Role||High School Student, Pianist, Senpai, Student Club Member, Wealthy|
|Visual novels||Main character - Tokimeki Memorial Girl's Side: 3rd Story|
|Voiced by||Tachibana Shinnosuke|
A blue-haired young man whose hair is styled suspiciously like Beethoven's, Seiji is part of the chess club and is also your senpai. He thinks very highly of himself, and is a little arrogant. He plays piano and loves music, it is his true passion. Seiji and Konno are friends, and are the smartest in their grade.