Summarize for me please

Uhh so basically mc got in the train to smuggle some drugs which were discovered by the red head. The red head clearly wanted to play a game which was making the mc get passed around in economy, then in first class all the way to prestige. When mc finally got into prestige he was hesitant about the red head but the red head is clearly a master mind or smth and he easily manipulated mc. They've had their ups and downs until in the end when he told mc to finger himself and find the sweet spot until he's stimulated. During that, the red head switched the drugs with fake powder but in the end he and the mc stuck together and the drugs in the marble were forgotten about. (As in when the mc finally got his marble he wasn't happy and he just wanted to stick with the red head)

It's a sad story tbh

Thanks. Saved the time:)