Responses
Pretty sure those were basically Viagra pills cause homeboy had issues getting or keeping an erection which is why Shouta said it didn't matter since Hiroto wouldn't be using his dick.
As for the girlfriend thing, this is likely a language barrier problem. He was introduced as a friend that was a girl... As in a girl friend, not girlfriend. Which is why Hiroto says "introducing you as a boy friend would have been weird" and why Shouta cried about being a friend Hiroto just had sex with.
There is something off with this story. There are parts that seem like they were either translated wrong or something else. Like Shouta kept saying he was introduced as a girlfriend when clearly he wasn't. And About the pills thing too. It seemed like he was planning to use them on Shouta because who takes out the pills they DON'T plan to use and then sticks them in an easily accessable pocket???
Side note: If Shouta knew about the pills and said that he goes for men who do bad stuff to women doesn't that mean he had to have seen Hiroto with the pills with a woman before????
Anyway, I like the story and love this artist's style. It's really nice but the story just has some weird contradictions.