Ichika, the most beautiful girl in her grade, has a secret that she can't tell anyone... That is, she is training the dull old man who lives next door. "Hey, old man, you were looking at me with dirty eyes just now, weren't you...?" At first, she just wanted to tease him a little... But her actions gradually escalated, and Ichika began to train the old man like a pet in order to satisfy her sexual desires.