Ryo married Eri and became the son-in-law living with the Ogawa family. With Eri constantly busy at work, Ryo takes on the role of househusband, handling all household duties. However, this leaves little time for intimacy, causing their sex life to dwindle—something his mother-in-law, Shizuku, eventually notices. Concerned, Shizuku tells Ryo, "If there's anything I can do, please let me know," and gently guides his hand onto her body. Overcome by the warmth of her touch, Ryo finds himself aroused, left wondering where this unexpected connection will lead.