Naomi (Makoto Nishiyama), who returned to a small town because her adoptive father was about to die, met her brother-in-law, Hiroyuki (Hideyuki Kamada), again. Both of them have a history of becoming a man and woman, and Naomi feels an uncontrollable feeling for Hiroyuki. After that, she reunited with her childhood friend Yoshio (Yuya Matsuura) who also returned to the town....

山間の小さな町に養父の最期を看取りにきた直美は、義理の弟・裕之と再会する。ふたりはかつて姉と弟という関係を超え、男女の仲にあった過去があり、直美は裕之への思いを再燃させる。しかし、同じく町に戻ってきた幼なじみの義雄とも再会した直美は、思いが揺れ動き…。