A cuckold fetish fantasy where a man desires to see his wife having sex with someone else. Torn by conflicting emotions, he cannot bear the thought of another man taking his beloved wife, so he turns to his lesbian best friend from college, Ayaka Mochizuki, asking her to sleep with his wife. The story explores the depth of his feelings for his wife, his inner struggle with jealousy, and his confrontation with his own desires, culminating in intense lesbian infidelity and passionate squirting scenes.