In front of her husband, she's a serious and dutiful wife. But secretly, she's frustrated with his infidelity and disgusted by his foolish attitude toward work. Through dropping off her young daughter, she grows close to a fellow mom, Sarina, and the two quickly develop a passionate affair, unconcerned with who might find out. Sarina, too, is unhappy—her husband refuses to help with childcare, and though she pretends to be the quiet, obedient wife at home, she's grown resentful of her unsatisfying sex life. As the two women bond over their shared struggles, they gradually become emotionally and physically drawn to each other, losing themselves in stolen moments of intimacy.
Meanwhile, Nene is exhausted—her job and family life are falling apart, leaving her drained and disillusioned. She often reminisces about her first love from school days, unable to let go of those feelings. On her daily commute, she drifts through life lost in memories. One day, she spots an old friend's name on social media—her first love, Nene. She assumed he'd forgotten all about her, but to her surprise, he remembers and replies. That single message reignites something deep inside her.
Sachiko, on the surface, is a quiet and demure subordinate at work, but hides a voluptuous figure beneath her professional demeanor. At home, she plays the virtuous wife, yet secretly harbors a deep submissive desire to be dominated by men. Though she feels guilt about crossing boundaries with her direct junior and fears exposure at the office, her overwhelming sexual cravings overpower her hesitation. Through their affair, she begins to unleash the hidden side of herself—the one her husband has never seen—embracing both her professional allure and her secret, masochistic desires.