Mr. Oshima appeared in the 2025 development announcement and participated in the side story trial writing; he is a math teacher at the school.
A side story
He jokes about Riku's relationship with Towako Hayasaka, but Towako stops him from interfering in student life. The character is based on a public trial and does not yet have a complete experience in the official release.
Related entries
- Project Affiliation:Why isn't my little sister cute?
- School colleagues and a conversation with the trial writing:Towako Hayasaka
References
Data compiled on: 2026-10-07.