The Kuramoto family is a three-generation family of Eri, his son and his wife, and grandson Kameji. On behalf of his son and his wife, who are both busy working, Kameji was raised by his grandmother Eri from a young age. One day, everyone decided to go on a hot spring trip to celebrate Eri's return, but on the way, the son and his wife, who were still busy, became suspicious of going to the clouds, and Eri and her grandson decided to head to the inn. The two who arrived at the hot spring ...