[HOWY-009] My last family trip. I was captivated by my sister in a yukata... I had creampie sex for two days and one night. Hikaru Miyanishi (Censored)

My older sister is tomboyish and competitive. She's also good at sports, and I've always lost to her since we were little. But then suddenly, she received an arranged marriage proposal, and things progressed quickly. She'll be leaving home soon. Meanwhile, I also got a job around this time, and to show my gratitude and congratulations, my mother used her savings to plan a hot spring trip. To celebrate her children leaving home...