Can you send me your save game somehow, so I can take a look at what happened to gou. (The one you used not the one you finished) As for sleeping with Zoe I didn't mention but you need 8 affection minimum, joint event appears as a player hint once you finish both Ava and Zoe's stories, same with the park event
I don't have enough affection, but it says that I can't level them up any more in this version of thegame.There's no place in these comments to attach the save file. I uploaded it to MEGA. Here's the link. https://mega.nz/file/niAn0R6Q#dyioNIlUkODtGpZ8bOqP7kCnAzwDtCgDjRA5gUG75_Q