Spoilers: As much as that ending makes you believe that the prostitute must be the same girl that broke his heart, she does have some features that distinguish her. Specifically the mole, also the fact that it feels strange that he'll react after she removes the face mask since that barely conceals identity at all. Srsly thought they were the same person at first, but now I'm a bit interested to see how a second girl fits into the equation.
She's actually like a child lmfao. Good thing they cleared up that she shouldn't be doing this with other boys. Even tho can confirm, this is what us guys do with each other.
So for those confused about the family tree, the maid is technically mc's half-sister (who was born entirely out of an incestuous relationship while mc wasn't).
The flagship story is adorable and wholesome. The others after that feel a bit omnivorous. Shame we didn't really get to see Kotoha's stalker in the end.
I really liked this. It feels like the final form of Onee chan was the combination of her regular "old" self and her "awakened" self, referring to when the brother raped her while she was conscious and then ingrained the hypnotic statement. She should't really remember much about the hypnotism itself, so it kinda implies that she understands what has occurred up to this point. It's kinda ntr-y, but the senpai wasn't even a decent dude anyway, and her "love" for senpai was simply a misunderstanding of her own body's response to her brother's training.