I Got a Cheat Skill in Another World and Became Unrivaled in The Real World, Too - The Complete Season (Blu-ray) (2 disc) (Import)

After moving into his late grandfather’s home, he discovers a strange door. Yuuya opens the door, steps inside, and is suddenly transported to a magical world! This new world holds rare treasures and grants him powerful skills, which he takes back to Earth for a new lease on life.