いじめられて死のうとしていた俺が大魔導士の力を継承し、異世界と日本を行き来する (Associated Names)

Masayoshi Tachihara, a high school student, tries to commit su*cide due to the relentless bullying he faces at school. However, by a stroke of fate, he survives, and a mysterious door to another world appears in the ceiling of his room. Deciding he has nothing to lose, he jumps through the strange door and finds…