A high school girl the size of a palm x a recluse under one roof in a daily adventure!! When she opened her eyes, high school girl 'Koiwa Nozomi' found herself in a body just 12cm tall. The place she arrived at, risking her life, is a room in the apartment of the recluse 'Ookubo Yume'. With no memories and nowhere to go, Nozomi secretly starts living in Yume's room, which is cluttered with empty cans and trash...?! A comically unbalanced duo unfolds a survival story!