I don't understand this kind of clues
Get her SexApp Id at the pool and raise her corruption and trust stats to progress on this quest
how do you do that ?
and since the gifts bought in the store are delivered I do not find the option to do so
I can not find the houses of several girls either because it does not give me the option of it
and a question in the future meet the moms of the other girls o more teachers ?
Will try to answer all of that without making any mistake because there are a lot of sub questions in your post.
To raise Kate corruption and trust, you have a few choices: Talk to her on SexApp after 5pm, go train with her at the pool (university) or eat your lunch with her at the cafeteria (university). The gift quest for kate does start while eating with her at the cafeteria.
You can only visit Alice at her house for the moment.
We are going to publish soon a complete walkthrough for the game which should make the game easier to understand.
In the future, early May (between the 5th-10th may) we are going to publish an update that will contain a new place "The restaurant" (it has a name but we don't want to spoil) and the access to the first part of the bdsm content so mom and sis will follow you in the basement to play some fun games with you if you have enough stats with them. + Something with the SexApp we also don't want to spoil.
End of May/early june we are going to publish a massive update which will contain a complete rework for the university and for the home (mom and sis) there is a game design sheet that I don't want to share here because we may still change a few things. But we will also make something that has been asked a lot. The characters will change the way they interact with you when you had sex with them or "enslaved" them in the basement.
In the long term: Strange shop owner will take some sort of role, more threesome, gangbang, orgy, fetishes in the game. Each girl will have a house. UI complete rework, more locations, STARTUP PATH.