Main character of [[Bacchikoi!]]. He is one of the two love interests the player ([[Kanada Toshu]]) can pursue.

He is the son of Yanai Keiji, the president of Yakyusha Academy who is also a business partner of Saji Hideaki, [[Saji Tomoka]]'s father and monarch of one of the richest families in the game. He was set to an arranged marriage between him and [[Saji Tomoka]] by their parents to bring the families closer.
He skips classes often due to his father's position. Despite this, he is deemed as a genius and achieves good grades at his school and is seen with insurmountable potential.