Miyako Kaneshiro lives alone in a house like a hot spring inn. The son and his grandson returned during the holidays, but Miyako stubbornly refused to take a bath together. Miyako had a tattoo on her chest and wanted to keep it secret from her family. However, found by his grandson Yuto, instead of rejecting the tattoo, Yuto becomes sexually aroused and has a relationship with Miyako. Miyako was captivated overnight by the sexual desire of a young man.
