Every year, he goes to the fireworks festival with his best friend Rui and childhood friend Rima. This year, they go to the fireworks festival together, and Rima confesses her feelings to Rui, but he rejects her. "I'm going home," she says, trying not to show her tears, but he chases after her, worried about her. She is caught in a sudden downpour and finds Rima by the side of the road, soaking wet and heartbroken. The rain only gets stronger, so the two of them run into a love hotel. Her yukata sticks to her skin in the rain, and her bra is visible. It's inevitable that a strange feeling will arise when a young man and woman are alone together.