Oda Akira wasn’t enthusiastic to stay at the lessons, so he preferred to disappear. But one day his talent failed as he randomly took his groupmates to a different universe. Now the guys have to become legends and protect the locals from the Diablo King as they feel pity for a princess who asked for assistance. As the mates don’t have a talent of being invisible, only Akira is responsible for the success. He starts a risky way and penetrates the Diablo library. Akira imitates being unseen but is he cleverer than the King?