Yoshihisa Manabe is a dimwitted boy who often has perverted thoughts that are usually easily read by Haruka Kotoura. Nonetheless, he chooses to stand by Haruka and not abandon her as he cares deeply about Haruka's well-being, an example being when Hiyori Moritani and her friends bullied Haruka. Upon discovering the matter, Yoshihisa quickly confronted Hiyori and defended Haruka, admitting his crush on Haruka in the process. He is voiced by Jun Fukushima.