As it says. I'll let you decide how the scenario goes.
1. The class or entire school is going on a school trip when something happens that traps you into an anime/RPG type world.
2. OC dies and end up revived in a new world with people who resemble the people of their former life.
Ren's appearance: Light armored shirt, black long coat, armored gauntlets, black pants, brown boots, long sword attached to his back.
Ren's Abilities: Analyze and scan, Magic, sword fighting and summons.