|Anime Debut||Episode 3|
- "Mom...! Mommy!"
- ―Susumu's last words
In *Episode 3 he is seen in a flashback admiring some sparklers with his parents and Junko Yasumori when the Kirishikis arrive. His father asked if he could say hello, but shakes his head and runs behind his mother when he saw Chizuru smile.
In Episode 4 while he was sleeping, he was bitten by Nao, woke up, and called out to her which Mikiyasu heard. The next morning, on September 7th, he went into cardiac arrest. Toshio Ozaki tried to revive him, but to no avail. Later, he and Mikiyasu were taken to Mizobe hospital where they both died. He doesn't rise up and stays dead to Nao’s devastation.