放課後の迷宮冒険者〈ダンジョンダ・イバー〉　～日本と異世界を行き来できるようになった僕はレベルアップに勤しみます～

Synopsis

Akira Kudo, a high school student who can freely travel back and forth between Japan and another world, Do Merta. With no goals in mind, he spends his time after school enjoying life in another world as he is! As an adventurer, he gets teased by the guild's receptionist, receives "rewards" from his magic master, and has fun with the girl he helped...!? "I hate pain! I don't care about ranking up! Guild requests are also troublesome!"