After his wife Seiko is hospitalized due to an accident, Shingo is left to live alone. Eating instant ramen every day and neglecting housework, he finds unexpected relief in the sudden visit of Seiko's mother, Towa Ko. Towa Ko begins supporting Shingo's daily life, helping with everything, and her kindness slowly captivates him. But as night falls, Shingo finds himself drawn down another path. Towa Ko's sensual charm stirs his emotions, deepening the bond between them. Shingo grows dependent on his mother-in-law's warmth, unable to ignore the new feelings blossoming between them.