Yandere
A yandere is a person romantically obsessed with someone to the point of abnormality. In essence, literally "madly in love". They often resort to manipulative or violent means to obtain the subject of their affection.
Lin Sandie recently discovered that she was actually a commoner NPC in a place called the Tower World.
Existing as a background NPC wasn’t necessarily a bad thing for her.
That was until one day, a player named Lou suddenly appeared in her world, forcefully altering the trajectory of her life. She possessed a face identical to her own, yet she was a ruthless lunatic, the most vicious viper in the world…
And under her maddening influence, Lin Sandie gradually unearthed an unknown side of herself.
Lou: Lin Sandie! You are completely surrounded by me! Coming out obediently to be my girlfriend is your only way out! You can’t beat me if you put up a stubborn resistance! And you wouldn’t dare jump off a building! Let me repeat myself! You are completely surrounded by me! I advise you to come out obediently, turn over a new leaf, and be a proper top. I can forgive the brutal fact that you once killed me…
Lin Sandie: …
Lou: I will forever be loyal to love, loyal to you, and loyal to being a bottom.
Lin Sandie: You didn’t need to say those last few words.