The Min family's parents had always been infertile and believed in superstition. They adopted a daughter and named her Min Ran. Three years later, they gave birth to their biological daughter Min Jiaqi.
Growing up, Min Jiaqi was overly dependent, obsessed, and jealous of Min Ran. After witnessing an incident of Min Ran kissing a female classmate in high school, she became furious and told her parents about her sister's early love and kiss with her female classmate. Min Ran was kicked out of the house and she cut off contact with the Min family.
After Min Ran left, Min Jiaqi's hidden emotions gradually surfaced.
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Concept: Jealousy changes people beyond recognition