Isekaigaeri no Yuusha ga Gendai Saikyou!

Daiki Morishita, an ordinary secondary school student, is transported to a dreamlike world and defeats the Demon King. With his main goal accomplished, he returns home, missing the meals his mother used to prepare. But Daiki has brought something extraordinary back with him. The returned hero now faces the modern world with powers gained in the other realm, and the story also involves training beautiful warriors with superpowers.