Miori is a housewife in her third year of marriage to a man working at a major real estate company. One scorching summer day, she comes across Okajima, a renowned architect she's admired since college, collapsed and unconscious. She bravely steps in to help him. Grateful for her kindness, Okajima agrees to take on the couple's planned home renovation. While Miori and her husband are deeply touched by his generosity, Okajima has a hidden motive—his true intention is to experience the secret allure that Miori has never revealed to her husband. Big-titted actress Mao Kurata succumbs completely to this seduction in this NTR (cuckold) story.