To put it simply, depending on your pick, you'll get different reactions and scenes with the character. Love is simply more romantic whereas corruption is more slutty? Though you will have to wait for updates to really see a difference. Current build doesn't have much content on that yet.
I enjoyed this! Really good game so far! The writing is not amazing, but it's good enough to give personalities to the characters, and that is something a lot of harem games fail to do. I like the cool 2D art! I can't wait for the sex scene with the Tutor, Sophia. The lingerie scene is such a tease! This dev deserves more support!
Also since MC got Anika pregnant, any chance we get to see more characters get knocked up by MC? Particularly Sophia and Ashley and the President and Quinn.