I went ahead with the story (**Spoiler: timeskip) and now I don't have the chance to complete the college and luna's nexus storyline. Please tell me there's a way to play the content before the "point of no return".
Not in that save, you will have to play through the whole thing all over again, but this time make sure to save before the point of no return that way you can go back if you missed something or even just be in the Act 2 phase of the game since quite a few of the H-scenes get locked out of in Act 3
