Akira Kudo, a high school student who can freely travel back and forth between Japan and another world, Do Merta. Without any mission, he spends his time after school enjoying life in another world as he is! As an adventurer, you'll be harassed by the guild's receptionist, receive a "reward" from your magic master, and have fun with the girl you helped...! ? I hate pain! I don't care about rank! Guild requests are also troublesome! A leisurely labyrinth exploration fantasy just for after school!