Save Me
turn out to be twins separated at birth when their biological parents got murdered by a crazy woman. namsoo has been obsessed with finding his twin brother ever since he found out the adoption. he takes revenge for his disabled brother who has been relentlessly bullied and physically abused/shamed by the assholes in the school. good ending, both brothers stay in contact and since namsoo got put into a mental asylum, his brother visits often. kinda open ended since the story doesn't show what happens to the two afterwards, only that they still see each other and have maintained a relationship, finding back a family.
Perfect Secret Love: The Bad New Wife is a Little Sweet
https://www.ohmanhua.com/15841/
Doppio Senso
https://anonanemone.wordpress.com/doppio-senso/ https://read.asianovel.com/series/doppio-senso
Kaifuku Jutsushi no Yarinaoshi
The Taming of The Tyrant
https://www.novelupdates.com/series/i-tamed-a-tyrant-and-ran-away/
The Villainess Reverses the Hourglass
https://novelfull.com/the-villainess-reverses-the-hourglass.html
Mobius Strip