Every day I feel like oxygen does not enter my lungs no matter how much air I inhale. Love, sex, anxiety about the future. Youth when my worries were endless. You're always laughing and dazzling like Natsuzora ... But I saw it only once. You look sad in an empty classroom after school ... "It looks good on a ponytail" The only word I exchanged with you. Hmm ... you loosened your mouth and left with a smile. At that time, with a beautiful girl in uniform ... For a girl who fell asleep in the infirmary during the lunch break ... After school, with that child who was looking at the ground ... Classroom sexual intercourse.