First love never comes to fruition. After all, Kojima's first love is his best friend's mother, Yuki. She's married and has children. It's just too high a hurdle to overcome. He had almost given up, thinking it was a love that should never come to fruition, but then, due to an unexpected turn of events, he ends up staying at his best friend's house, and the suppressed feelings of love he had been holding back come back to life. Thinking of Yuki, who is just as beautiful as ever, Kojima is indulging in faint fantasies, using her underwear as a stimulant. Then, Yuki walks in...!