Yuki and Yuka are a university student couple living together. One day, while concentrating on her assignments, Yuki acts a little coldly towards Yuka who invites her to see a movie. Yuki immediately regrets her actions and apologizes to Yuka but she takes her behavior as an invitation and they go straight to bed. Yuki is usually passive but wanting Yuka to feel good today, she volunteers to play the top role... A sweet and slightly embarrassing story of the naughty daily life of a couple.