A collection of Shouma Keito's oneshots from Pixiv.

Failing to complete the class goal 'Leave no food behind!' for 11 years straight, Mochizuki Takashi (4th grade) has turned 20 stuck as an elementary schooler. Then, an old classmate of Takashi's returns to his current class, Takashi's first love, Asahina Megumi (20), as none other than his homeroom teacher!

The delinquent succubus, Saki-chan, appeared in front of Ryou Shakuba (age 18), who had just fulfilled his wish of living in the cosmopolitan by himself...! The cohabitation with a pure succubus (totally non-H), start!