Masurao Sujimori

Masurao Sujimori (筋森益荒男, Sujimori Masurao) is an English teacher in Matsuri and Suzu's school. He is a former mercenary who loves cats.

Plot
Needing to pee, Matsuri Kazamaki enters the boys' bathroom without even realizing it and Masurao sees him and takes him out, commenting this isn't the first time Matsuri entered the boys' bathroom.

Later he found Shirogane in his normal cat form and hugs him against Shirogane's will.