Spoiler
The main antagonist here is fuki san.. Didnt expect that... This story was so danm heavy(for me) ...really a twist (ㄒoㄒ)
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Like, she is a really fucked up yandere( ºÄº ) for mary san( reiko's grandmother), when mary san was young, she is a popular pianist and at that time, fuki san was an orphan and mary san took her in as a maid. Fuki san was an avid fan of mary and literally see her as a goddess, and then mary got into an accident, and mary never again play piano in front of others or fuki and only taught reiko when there is no one around. Fuki san was so obsessed with mary san and literally do anything or scheming that affected so many people lives to make sure she have mary san for herself and she thought that by doing that she will protect mary san. She dislike reiko because mary san spending so much time with reiko than her. Fuki san said that she's trying to love reiko but couldn't then proceed to abuse reiko when she was little and forced her to do so many housework just to lessen reiko's presence in mary's life.
Im dying