"I Became a Female Teacher in an Otome Game, but I'm Working Seriously. (Serialized Version)"

Kurahashi Ryou is reincarnated after being hit by a truck driven by a drunk driver. To support his mother, he becomes a teacher—a long-held dream from his past life—and gets a job at the private Minekuru Academy. However, at the academy's gate, he realizes that he is a rival character in an otome game world. Moreover, it seems he's a character who dies no matter which ending is chosen!? No way! He decides "I won't interfere with the game's heroine or characters," but that resolve quickly disappears... because the game's heroine is way too stupid. One way or another, a single math teacher gets caught up in various dangerous people around him and a story about an airhead.