Even my mother-in-law looks like a conceived Miki Matsuzaka

Miki Matsuzaka, a mother-in-law, engages in a taboo relationship with her son-in-law, who is married to her daughter. As they live together under the same roof, Miki finds herself drawn to her son-in-law's attention and affection, leading to a passionate and intimate affair. The son-in-law, who initially treats Miki with respect, eventually gives in to his desires and begins a secretive and illicit romance with his mother-in-law, exploring themes of incest and forbidden love.