With his girlfriend's younger sister, who had become homeless due to a sudden downpour, until morning... (Neo Akari MIAA-159)

The man was considering marrying his live-in girlfriend. She had a much younger sister, Juri, who often visited. One day, a sudden downpour left Juri soaked and stranded at their house. Meanwhile, his girlfriend was also unable to return home from work, leaving him and Juri alone…