If there's anything that concerns Fuyuki's self-esteem, Momo won't stay silent. To Momo, Fuyuki is a person she respects very much. There used to be an incident that made Fuyuki hurt for protecting Momo.
That day, in Tokyo.
They're still SD.
After school, Momo is bullied by her friends. Especially the boy in front of Momo making violence to her. Just then Fuyuki happened to pass in front of them, Fuyuki knew Momo had been bullied... Fuyuki tried to help him. Fuyuki didn't challenge him to a fight, he only touched him because he was a year older than them....
They then kept quiet.
Then Fuyuki grabs Momo's hand and drags her out of the swarm of bullying boys.
Suddenly, from behind... A boy came by launching his kick that made Fuyuki fall down.
Fuyuki's head had hit the pavement of the road and his nose was bleeding.
The boy was arguably his bully chief.
He approached Fuyuki and pulled on her shirt.