The content below is entirely editable.
A Fat, Spoiler Boy Turned into a Handsome Athlete
Tonami wasn't always as handsome and athletic when first introduced. Being a fat, sickly, and spoiled child in his younger days, Tonami was regularly bullied until Tsubaki stepped in to both protect and torment the boy. Upon entering middle school, Tonami learned that Tsubaki was asked by a teacher to look upon him. Disgusted that Tsubaki didn't protect him out of being someone special to her, Tonami transfered to another school and regularly worked out to improve his health, lose weight, and change his appearance.
Transfering to Hokuei High School with the other characters, Tonami plotted revenge on Tsubaki to try hurting her back once their relationship builds up to a certain point. However, Tonami later realizes that his feelings for the girl are of love, admiring Tsubaki's free nature. The disgust he had for Tsubaki only came from feeling rejected by the girl. Tsubaki does reciporcate Tonami's feelings and the two become a pairing during Hokuei's culture festival.
Like Asaba, Tonami is an admirer of Arima who helped defend the boy against any bullying whenever they met during elementary school. Unlike Tsubaki, Arima never tormented Tonami when he helped him out. Tonami had disliked Yukino at first because he wondered what Arima seen in the girl. However, the two make a grudgingly connection when both learn they had an obsession to change their image once Yukino learned of Tonami's revenge plans. Their closeness did lead Arima to show his dark side towards Tonami due to how increasingly possessive Arima was becoming towards Yukino. When Tonami decides to open up to Tsubaki and keep his distance from Yukino, Arima cools down his attitude towards Tonami and the two become friends once again.