Eiji is Rui's classmate and friend, and has a crush on him. Even after Rui and Yuujirou get together, Eiji still teases Yuujirou from time to time, and even encourages him to be honest with Rui about his feelings. The more observant Koudai usually drags Eiji away to his family restaurant whenever Rui and Yuujirou need a moment.
Content compiled by AnimeList.moe from publicly available sources.
