I don't know and can't remember if DPC works with foreshadowing, but is there any possibility outline of a male person with a huge cock is foreshadowing Tommy's death? Tommy always brags about having a huge cock (probably not true), but it's undeniable that the guy is a massive DICK (pun).
Of course, DPC works with foreshadowing. Mightybored has already mentioned the sneakers by Troy's bed. There are two more allusions to Chad's homosexuality. First, in EP1 the MC asks Chad ober is gay because Chad wants to watch the MC's ass and when talking on the phone Chad said to the person on the phone to wet his fingers and stick them in. With a girl, you don't have to wet your fingers when you put them in her pussy.
For example, the MC thinks to himself before Major Choice 4, Fight the Jocks, so he shouldn't reveal his martial arts skills.
If the MC takes a shortcut at the Mansion repair game, in which he takes one of the three opportunities to clean a part of the Mansion faster, then Jacob says later always at the table, so that it seems to him, so that was cheated. But if the MC doesn't do that, Jacob doesn't say that. No idea where the clue will lead, but we will find out.
If the MC doesn't beat Tybalt, then it says in the BIOs so that the MC was the bigger man. That implies so the MC will probably far surpass Tybalt in the later.
DPC has a bunch of little clues like that in play. The trick is just recognizing them and putting them in the appropriate context.