After getting back into the rhythm of daily life following marriage, wife Nene returns to work as a home care helper. One day, while visiting a client's home, she accidentally soils her clothes and borrows a shower to clean up. Her fresh, pristine appearance captivates her client, Hirai, who, overwhelmed by loneliness as a single man, impulsively embraces her. With little experience beyond her husband, Nene finds herself unexpectedly overwhelmed and swept away by Hirai's intense sex. Though she continues her visits pretending nothing happened, Hirai's burning desire refuses to subside, awakening new, forbidden feelings within her.