un Mi and Ji Eun, Jin Hong’s younger sister, have fallen out and are not on good terms anymore. The tension between them escalates as soon as they run into each other at Jin Hong’s residence. It doesn’t take long before Jin Hee unexpectedly crosses paths with Ji Eun. Seeing how much Jin Hee has grown, Ji Eun can’t help but develop an affection for her. Unaware of Ji Eun’s relationship with Jin Hong, when Jin Hee sees Jin Hong and Ji Eun together, she immediately jumps to the conclusion that Jin Hong is being unfaithful to her mother.