This work depicts the intense interaction between college student Kota and his aunt Yumi during a family hot spring trip. While the story itself is classic, it's Yumi Kazama's overwhelming sex appeal that shines. Her mature body and expressions, especially the way she licks, are just at the level of 'how it should be.' Although some are concerned about the male actor's tattoos, Yumi's eroticism surpasses that. The perfect balance of being scolded and pampered, along with several lines that hit the spot, are not to be missed even by non-fans. The performance of Yumi, called a legend, does not fade even as younger actresses appear year after year, but rather increases her presence. We look forward to her various challenges in the future, but first, please fully enjoy her charm in this work.