Isekaigaeri no Yuusha ga Gendai Saikyou!

Daiki Morishita, a normal high school boy, was transported to a fantasy realm, where he ultimately defeats the Demon King. Having fulfilled his mission, he returns home, terribly missing his mother's home cooked meals. Upon his return home however, he discovers that he has brought something special back from the fantasy world.

(Source: MU)