@Scynix
Actually I haven't read the WN or anything, it's mentioned in the manga but very briefly and then not brought up again.
Page 6 in chapter 4.1 talking about the maid Talt:
"She's infatuated with me strictly because of the circumstances from when we first met... Plus, by applying brainwashing techniques I learned while I was still alive, I've inspired her undying loyalty"
Page 9 in chapter 5.1 talking about (the assistant?) Macha:
"By freely utilizing my brainwashing techniques, I slipped into her heart and deeply planted a strong affection and loyalty towards me."
Because he also talks about how she (Macha) was abused as an orphan and was distrustful but just wanted someone she could depend on, it sounds more like some minor psychological manipulation. 'Brainwashing' has connotations to some pretty extreme stuff (even though it might technically be the correct term?) so manipulation seems like a more accurate description of what he has done.
But yeah anyway I dislike how they glossed over the forming of their relationships. Like you say at least give us a few pages each, something like 1 page for their first few days then step it up and make each panel 1 month time skip just so we get a better grasp of their relationship and personality.