https://forum.novelupdates.com/threads/reiko’s-manners-–-she’s-referred-to-as-a-villainess-but-actually-she’s-just-penniless.101808/
According to people who read the MTL of the web novel:
Fuki was obsessed with Mary and abused Reiko as a child, since she took all of Mary's attention. She also lied to Reiko's dad, which caused him to disown Mary and Reiko. This is the reason why they're poor. She also told lies about Reiko to multiple people, including her grandson, who would then push her down some stairs. She lives a happy rest of her life.
Isekai girl is delusional and brainwashes everyone, including the otome heroine. At the end of the story, she creates a successful otome game, and lives a happy life.
Otome heroine is brainwashed and acts like a b*tch towards MC. She ends up moving to America and lives a happy life.
Reiko's landlady is important and is the only genuinely nice person in the story, aside from the twins. She takes care of Reiko after she got pushed down the stairs. Ends up marrying Reiko’s dad at Reiko's insistence. Reiko loves her like a mother. Reiko's "revenge" is to take up all her time, so she can't spend it with the sh*t dad.
Reiko's dad is a total piece of sh*t. Disowns Mary and pushed Reiko onto Mary to burden her due to Fuki's lies. Tried to scam Reiko out of her money. When a landslide hit Reiko’s house, he was there and could have saved her, but instead slapped her hand away. Ends up falling in love with landlady. I mean, he lives a relatively happy life too, since he's married to his "true love".
Two out of six capture targets like her for her body. Doctor doesn't seem relevant to the love story.
I think Reiko ended up marrying "poor" black haired, sword guy from chapter 3's ML intro. Reiko doesn't seem interested in other MLs.
Sara and Soujuu are the best friends to the end. They get married to their arranged marriage partners.
Reiko is too nice and doesn't try to get revenge on the antagonists. She also never thought Fuki was abusing her. It seems like Reiko gets abused throughout the whole story and does nothing about it. She's frustratingly naive. Which is fine, I guess.
Villains don't get served justice and they all live happily ever after. It seems like it will be good hate-read material, if MTL web novel spoilers are true.