Hajime Kamoshida

Finally, the day of Mai's high school graduation has arrived. While Sakuta eagerly waits for his girlfriend, an elementary schooler who looks exactly like her appears before him. Suspicious, and for all the wrong reasons... Meanwhile, Sakuta and Kaede's father suddenly calls, saying that their mother wants to see her daughter. She was hospitalized because Kaede's condition had been too much for her to bear, so what could she possibly want now?

하늘과 바다가 반짝이는 마을 "후지사와"에 사는 고등학생 아즈사가와 사쿠타는 같은 학교 선배이자 연인인 사쿠라지마 마이와 설레는 일상을 보내고 있다. 하지만 어느 날 첫사랑인 마키노하라 쇼코가 등장하면서 그 일상은 완전히 뒤바뀌어 버린다. 알 수 없는 이유로 '중학생'과 '어른', 두 명이 존재하는 쇼코와 부득이한 동거를 하면서 사쿠타와 마이의 관계가 삐걱거리기 시작한다. 그러던 중 '중학생 쇼코'가 위중한 병을 앓고 있다는 것을 알고 사쿠타의 가슴 흉터는 다시 벌어지는데...

After a draining December, Sakuta is quickly nearing the end of his second year of high school. Since Mai is a third-year student, they don't have much time left together before graduation rolls around. Meanwhile, his sister, Kaede, is slowly but steadily venturing outdoors again. Just as she begins to find her footing, she announces her most ambitious goal yet—attending her brother's high school! Sakuta knows better than anyone how difficult this will be for Kaede, and he's ready to support her however he can. He's just not sure if that's what's best for her...or what she really wants...