Every day on the train she takes to school, Tsumugi becomes a target of groping. The man's fingers, approaching silently, feel surprisingly good... To put it mildly, it's a direct hit! Even though her mind finds it disgusting, her body craves more... In her silence, she can't believe how much lubrication is flowing out and forming strings! What binds them isn't the red thread of fate but the lascivious threads of lubrication. Submissive Tsumugi falls into an impure relationship and boards the train where the man waits once again today.
