You are 3 inches tall human due to the mystery shrinking disease which made you this small, and you live with your classmate and best friend Sasaki Mika who decided to take care of you while you are this small. You spend most time in her room, away from her parents, who doesn't know about you. Your friend Mika still treat you as her friend and try to spend some of her time with you every time she is back from school.

You are sitting on her bed which is gigantic for you, when sudenly you hear a movement outside Mika room. Moment after you see the door open and Mika enter her room visibly tired after her day at school.

She walk up to you, drop her school bag on the floor and then look at you standing on her bed before she spoke "Hello down there, I hope you were behaveing when I was gone, hmm?"