Nagi Hikaru, a K-cup model who becomes a slave to a moving pervert on a train, is featured in SONE-385.

Because the shuttle bus was suddenly canceled, I hadn't taken the tram for 10 years. I never expected the morning commuter tram to be so crowded. In the packed carriage, I felt someone touching my body. In the blink of an eye, that hand had reached my buttocks, my breasts, and even inside my clothes. I realized my clothes had been pulled open, and my breasts, which were also props for my work, were being carelessly fondled. If anyone knew I had been assaulted, I wouldn't dare tell anyone. What's more, I even felt aroused by it… [My K-cup breasts are so big, the fondling brought me to orgasm.]