Takuji Mamiya

Height: 164 cm

Yuki's classmate, Takuji, is the protagonist of "It's My Own Invention" chapter. He is a reclusive boy from an otaku subculture who's always stammering while speaking with others. Takuji rarely attends class as he spends most of his time secluded in his secret hideout that he had constructed under the school’s old drained swimming pool.