If ya'll want to know why the protagonist is obssesed with the housewife:
So because there's no legal nor illegal translation of the prequel of this series (at least that I know of), I bought it in japanese from one of the official sites (Buyee). I don't understand the language, so I don't know exactly what's going on but it's clear by the art that the reason this girl (the student) is obsessed with the housewife is because she's the only one who cared for her when she was SA'd as a child (the housewide used to work as a nurse in her elementary school but she suddenly quit and that was a big blow for the protagonist). Because of this she develops a crush on this woman, which ends up as an obsession. It's actually pretty sad and it's the reason why this girl is the way she is is bcos it's a defense mechanism she picked up due to being afraid of being hurt once again. I wish I knew japanase so I could know the specifics.