I AM LITERALLY BEGGING TO FIND A STORY I READ ONCE BEFORE SO IF YOU ARE READING THIS PLEASE HELP ME!!

i want to re-read just becuase i always remember parts of a story at random times then i want to read it but can't rememer which fustrates the hell out of me like it's no joke so please help me!

{JUST TO SAY I DON'T KNOW IF THE PARTS I REMEMBER ARE FROM THE SAME STORY BUT PLEASE JUST TELL ME}

THE PART I REMEMBER IS that the main character, the girl, was abandoned i think at the age four by her mother in the park or something. (it's either a kai or luhan story .. i'm not even sure of that)

ANOTHER PART I REMEMBER IS WHEN THE JEALOUS OTHER QUEENKA INVITED THE MAIN GIRL AND KAI/LUHAN (i think, I don't know if this is exact but..) TO HER BIRTHDAY PARTY AT HER HOUSE (?) and pushed her into the pool where kai saved her and told everyone that her, the main girl, mother (who abandoned her) was the  richest woman in korea or something.

SO THAT'S LITERALLY ALL I REMEMBER ~ PLEASE PLEASE HELP ME LIKE IT'S FREAKING KILLING ME! I WANT TO READ IT AND I NEED YOUR HELP ~ I SEARCHED AS MUCH AS I COULD IN THE SEARCH BARS AND GOOGLE (if that even works...)

please help me find this story ~ thanks