After his sudden accident, Manami's father-in-law, Kazuya, was on the verge of emotional collapse. Seeing his suffering, daughter-in-law Manami couldn't bear it and began caring for him devotedly every day. Gradually, Kazuya started seeing the resemblance of his late wife in Manami's selfless actions, and slowly began to recover. One night, while reminiscing, Kazuya found himself drawn to Manami and impulsively pulled her into an embrace. However, after sharing just a brief kiss, he refrained from going further and quietly walked away. Several days later, with her husband away on a business trip, Manami, wishing deeply that she could replace her mother-in-law even just once, surrendered herself to Kazuya. That night, a new emotion began to bloom between them.