Ryo Nishimiya is a supporting main character and a member of Kouta Hasegawa’s friend group. He is a fan of the Sanrio mascots, the Little Twin Stars, and the library assistant, as well as a person who struggles to fit in with most boys his age.

Ryo has an awkward introverted personality due to him being aggravated by his family calling him adorable. Ryo had always wanted to be a manly person as he stood out from the other boys in his class based on his interests.