That's also what I thought it was. Which is why he gave it to him and then they were fucking in the next panel. I would assume if he had been roofed, there would have been a panel with him waking up from it.
Scanlators say it was viagra http://fundashyaoi.tumblr.com
Okay okay god, I can't see pill color when it comes to black and white comics. And when a girl asks him if he wants to have sex and a guy is like "guess I won't need these strange pills" of course I'm gonna think its roofies. I mean if it were Viagra wouldn't he still need them if he were doing it? Maybe there's something I don't know about the circumstances in which he requires the Viagra but with all that information missing its only logical that I'd consider roofies a more conv
It gives a longer erection. Some guys who don't need them use them anyway for certain benefits like that.
But it's not recommended since an erection lasting longer than 4 hours can permanently damage the penis which is why there is that warning about seeing a doctor about it. I think they then have to jab a needle into the penis and drain out the blood so it goes down.
Plus, if this guy was gay (denial) and trying to live straight he might need the pills to get it up if he doesn't feel any sexual desire. Which is why he carries the pills like condoms, just in case.
I mean, it sounds like that guy roofied lots of girls so he got his just deserts.