A year after the passing of her mother-in-law, Towa and her husband Kazuki return to their family home, concerned about her aging father-in-law, Tooru, whose decline is becoming impossible to ignore. Tooru, who was childhood friends with Kazuki, once regarded Towa as a daughter, but Towa has long harbored deep feelings for him—feelings that began when he, a firefighter at the time, saved her life. Now, seeing Tooru alone and vulnerable, Towa confesses her love and boldly initiates a passionate kiss. As Tooru begins to reciprocate her emotions, he gradually finds himself drawn to her as well...