Fumika heard her daughter and son-in-law having a fierce argument and decided to intervene as a mediator. Known for always being calm and gentle, a figure who protected her family, the situation this time was unexpected. In truth, her son-in-law harbored intense feelings for Fumika. Unaware of his emotions, Fumika unconsciously exerts her charm, stirring deep desires within her son-in-law. Gradually, their relationship takes a forbidden turn. This work portrays an adult story of family bonds, hidden emotions, and the drama born from misunderstanding.