Waiting

My Girlfriend Cheated on Me With a Senior, so I'm Cheating on Her With His Girlfriend Yuu Isshiki, a first year university student, learns that his girlfriend Karen is having an affair with his senior, Kamokura. He was so shocked and devastated that

Mikado Hideo, who died in an accident, was reincarnated in another world as Lars Irving, the second son of a fallen aristocrat. Lars was not loved by his family in his previous life, but in this world he was doted on by his parents and older brother

In the second year of high school, the homeroom teacher dies in a murder case.The main character, Maoka Riku, is elected to a troublesome committee and soon finds himself involved in a murder case.Who killed my homeroom teacher?