Yuki Hayakawa has always held deep feelings for Takao Mochizuki, dating back to their childhood. Unfortunately, Takao's heart now belongs to someone else, leaving Yuki feeling defeated by the love triangle. However, there is an unexpected offer of comfort from Mr. Kanda, Takao's homeroom teacher. He kisses Yuki and whispers, "I've been keeping an eye on you." Feeling lost and heartbroken, Yuki succumbs to Mr. Kanda's advances and they make love. This physical connection initiates a relationship, but where will it lead?