Well I just unlocked gallery and the Iris scene is about giving her the guitar, which earlier the MC says he should sell test answers for money for guitar but ive sold to all characters I can and it still didnt trigger; maybe I missed a character you can sell to or maybe you need to sell it all as expensive as possible, either way I think thats the way to goChloe needs certain amount of intimidation, I think 4 is needed for that. To get Camelia’s anal scene, you need to choose to pursue with her at the beginning when you can either listen what Lauren speaks with the detective or check the sound from the bushes (Camelia). Then you get to take her home after your chat with her after the school.
The Iris one seems to be tricky one. I got the one where she strips to her undies by intimidating Sario and coming home late so Lauren is already passed out, but the two others are still mystery. Tried different combos, and nothing seemed to trigger them.