Two people, a guy and a girl, missed the last train and ended up in a mixed-bath hot spring experience. Imaru-chan, with her cute looks and already-final-weapon boobs, and the ordinary nice-looking Kenta-kun. We knew that male-female friendship wouldn't work, but as they bathed together, they got turned on. It wasn't just a little bit of kissing or holding hands, it escalated to full-on sex. They didn't hold back on creampieing, and Imaru-chan had no shame in her intense orgasms. They went all out with a long, long sex session.