At her husband's recommendation, Haruki chose private swimming lessons with Nana as an instructor. Haruki, who cannot love her husband, harbors secret feelings for Nana. Nana was lonely and neglected by her husband. Haruki kisses Nana during her lesson. Nana was shaken by her sudden incident, but Haruki's warmth at that time opened her heart to Nana... The two gradually get to know each other intensely and deepen their love. And it will bring changes to each other's homes...
