A mysterious dungeon suddenly sprouted in the mountain depths of an arcane village. The youngster who recently moved here equips himself with a sword to defeat the demons. A maid joined company on his travel.
Yuuki woke up to find his body has shrunken. Places where he does not remember, and his vague memory. Then suddenly Succubus appears,and he gets his semen taken by her. He continues to solve various mysteries in order to take his original body size back.
Super high pride of Demon King. But now she has a body like a little girl and her abilities have been sealed. she swears revenge on the hero, but she's t*rtured as much as possible ...