Sure! It's slightly tricky to get since it has some specific unlock conditions. Here are the required steps:
- In the afternoon after Will's class, hang out with Riley.
- Towards the end of that hangout, you'll have the opportunity to sexually proposition him. Do it and assure him you're serious.
- Once you do, Riley will bashfully thank you for the compliment. The game will ask if you want to keep trying to proposition him. Do it. (There are other spots to proposition Riley later on, but doing it here is the easiest.)
- At the end of the hangout, choose to go to the frat party.
- When you're given the opportunity to shower before the party, do it.
- When you arrive at the party, spend all of your time with Riley. You can still greet other people at the beginning, just return to him afterward.
- After Victoria arrives and has her confrontation with Riley, defend him.
- After the monologue sequence, choose to hang out with Riley one on one rather than meet some of the actors.
Then just play through and the kissing scene should unlock. It's one of my favorite CGs in the game 🙂