山本幸大
A [[Kokuhaku Jikkou Iinkai]] character. He is a Sakuragaoka High School student in Class 1-1, and a member of the "Idiot Trio" consisting of himself, [[Enomoto Koutarou]], and [[Shibasaki Ken]]. His voice actor is [[Matsuoka Yoshitsugu]]. [[Lens Koshi no Keshiki (honeyworks)|]] is one of the [[HoneyWorks]] song focused on him. 

Koudai has [[black eyes]] and [[short hair|short]] [[black hair]] that resembles [[bowl cut]] with [[arched bangs]]. He wears [[black-framed eyewear|black-framed]] [[glasses]]. Like the others, his [[school uniform]] consists of a [[blue jacket|blue]] [[blazer]], a [[white shirt|white]] [[collared shirt]], a [[red necktie]] and [[blue pants]].
yamamoto koudai