A sudden downpour prevented the male student Sakai from returning home from school, so the female teacher Reina decided to let him stay at her place. She had planned to spend the day with her boyfriend but ended up arguing with him after taking Sakai in. Seeing Reina's sad expression and her breasts soaked through by the rain, Sakai's admiration and lust exploded, causing him to pounce on her. Reina struggled with their teacher-student roles but gradually accepted him due to Sakai's sincerity and his feelings for her. They forgot everything and devoured each other like beasts…
