NYH-064 During a hot spring trip, I was invited to the bath by my cousin with bigger boobs and we ended up doing it under the starry sky

I went on a hot spring trip with my relatives and saw my cousin’s breasts growing into big breasts in front of me. I’m excited to grab my dick while washing. When we were alone, I went to the bathroom where no one came with my cousin who showed tsundere for the first time in a long time. I was irresistibly stuck in the hot spring while standing