Shinka no Mi: Shiranai Uchi ni Kachigumi Jinsei

Seiichi Hiiragi has spent his school life as the target of relentless bullying. When a self-proclaimed god suddenly transports the entire school to a fantasy world, nobody wants Seiichi in their group, leaving him to arrive alone in a dangerous forest. Hunger drives him to eat a mysterious Fruit of Evolution, and the effect changes his body, abilities, and prospects almost beyond recognition. His first major companion is Saria, a powerful gorilla whose affection is as overwhelming as her strength, and from there Seiichi's supposedly hopeless life becomes a chain of absurd victories, new skills, and unlikely friendships. The boy everyone discarded may have received the most ridiculous advantage of them all without realizing it.