Teruaki Morino

Teruaki Morino (森野 輝明, Morino Teruaki) is a friend of Fumi's, and the pair attended the same junior high school.

Backstory
Morino is both very kind and an excellent artist. However, after joining the art club in high school, his canvas was slashed by an upperclassman jealous of his artistic talent. As a result, Morino stopped attending school and became a hikkikomori - believing that he has no worth if he can't do art.

Personality
Teruaki Morino is very kind but he had an Inferiority Complex. Which led to him believing that he has no worth if he can't do art and becomes a hikkikomori.

Christmas Card
Fumi enlists the help of the Sket Dan to convince him to return to school, which ultimately proves successful.