A male student is called to the nurse's office. Hidden beneath his chest lies a secret he can't tell anyone. When he opens the door, only one person is there—Nurse Mikako, smiling gently at him. Gradually, despite his nervousness, he begins to open up. Then Mikako softly says, "I already know. Come on, reveal your secret right now." With those words, the student's heart begins to stir. He is now being asked to find the courage to confess.