Son-in-law Reiko Sawamura, a mother-in-law who was messed up by her son-in-law who has a strong libido - Reiko Sawamura (Honami Kosaka, Masumi Kosaka)

Reiko Sawamura, a beautiful and kind stepmother, finds herself in a complicated situation with her son-in-law Matsuo, who has a strong libido. Matsuo, who has been abandoned by his girlfriend, turns to Reiko for comfort and companionship, leading to a forbidden and taboo relationship between the two. As they navigate their feelings for each other, they must confront the consequences of their actions and the secrets they keep.