Reputation, huh. Knowing Hentai, even if they didn't lock the door...They probably wouldn't be found out.
Quite a nice ending though. They seem happy with this kind of relationship, too bad they can't just be open about it.
They wouldn't get found out by the girls, but they would be endanger of being found out by the shady, "can't get a woman thru normal means but is an inexplicable sexually Hercules" janitor or gym teacher, with the handy camera smartphone.
I mean... they can always tell everyone that they're dating, it's not like people will know what you're like when you have sex just because they know you're in a relationship...