If they break up with their boyfriends they will be in his harem. If they stay with their boyfriends they can just say "guess the condom broke or something."
'What kind of heaven is this'?
Why, it is the heaven known as Hentai, and as a Hentai Protagonist, it is your natural right to experience such events.
Great ending, though. All 3 have his baby except for her? Well, I guess then he'll need to put in quite the extra amount of effort to ensure the next time will test positive...
Welp, that teachers life is over......remember kids to always have some form of contraceptive if you don't want baby mama drama like he's going to get (if this was reality).