Hello, Sayoko
Damien has different scenes depending on if you bought the underwear or not in the mall event with him and if you went to the dance with him.
We are working on adding friend groups in the game with Kenzie and Alice, though the development of that content will be on hiatus for a period of time, and later down the line once you've locked in your routes with certain characters you'll be able to hang out with them more as your relationship advances. The game is still currently in development and will take a while to get to the stages that we want.