My nominal sister suddenly became my stepmother.
Many years later, she returned with her children, tore her stepmother apart and taught her sister a lesson: "Maybe you should call me mom, my good daughter."
The heroine has her own physique (passive trigger, disappears after the mind connects)
Gentle and sinister x lack of love and sensitivity (mainly shown to the male protagonist)
Let me explain: the heroine is gray, but not poor.
Let me explain again: You should be able to tell from the introduction that the male protagonist had something before meeting the female protagonist (only once).
I don't know if I should explain this: there are old jokes in this article.