Unable to return home due to heavy rain, student Sumire takes refuge at her teacher's house. The contrast between her usual lively personality and her voluptuous appearance as her skin soaks in the rain makes the teacher's sexual desire run wild! He pushes her down and gives her a drenched creampie! Then, the night goes beyond sheltering from the rain and they have passionate sex! They have a lovey-dovey bubble bath! After the bath, they have sweaty sex with wet hair! They can't hold back even during dinner and give her a blowjob...