I am cute, but I was a middle-aged researcher in my previous life? Surviving in another world with magic and sciences. The orphan Ren was riding the carriage after being sold when she got involved in an...

Masuda Keima, a lazy high-school boy who prefers to laze around and avoid working, gets summoned as a dungeon monster by a girl avatar named "Dungeon Core No. 695" who is the dungeon core of the mighty one-room...