大地(宇佐卓真)と光輝(那須泰斗)は中学からの同級生で、お互い友情以上の感情を持っていた。1年前、親の再婚を機に義理の兄弟となった二人。家族として振る舞う毎日だが、日々気持ちは溢れていて…。ある日、体調が悪そうな大地を光輝が心配する中、無理して登校することになったが、案の定、保健室でダウンしてしまう大地。光輝は授業を抜け出して大地の元へ…。
Daichi and Mitsuki have been classmates since junior high school and have feelings for each other that go beyond friendship. A year ago, they became stepbrothers when their parents remarried. They act as a family every day, but their feelings are overflowing every day... One day, Daichi, who forced himself to go to school even though he was sick, collapsed and was brought to the school's infirmary. Mitsuki sneaks out of his class and goes to Daichi...