Jessica and Eunhyuk are a couple, the cutest couple ever, they've been dating for 3 years and they really do love each other, one day Jessica meets Donghae and she doesn't know why but she's always really happy when she is around him, she refuses to love him since she is with Eunhyuk, as Donghae and Jessica become closer friends and Jessica's feelings for Donghae become stronger, she doesn't know what to do, so she dates Donghae behind Eunhyuk's back. Jessica is always lying to Eunhyuk saying she's gonna hang out with the girls when she meaning she's gonna hang out with Donghae. Eunhyuk becomes aware of Jessica and Donghae dating, but he doesn't want to believe it. Jessica knows she likes Donghae, but she always feels so guilty/bad for Eunhyuk, because she's sick of herself to lying to Eunhyuk, she finally breaks up with him, Eunhyuk knew she was gonna break up with him sooner or later though... 

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"I'm just gonna hang out with the girls" Jessica lied to Eunhyuk, but he didn't respond to her as he just silently nodded and watched Jessica walk out 

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"I can't believe you!" Eunhyuk shouted to his ex-best friend Donghae in anger 

"Whatever" Donghae arrogantly replied 

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"Cya..." Jessica's quietly said, trying to hold in her tears, as she walked away, she looked back at him and she knew he was dying inside... "Sorry" she said, as a tear rolled down her cheek 

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"I never asked for this to happen Leeteuk!" Eunhyuk shouted in sadness as he punched the wall...

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"I think he has a lot more then friendship on his mind" Donghae seriously told Jessica, not believing Jessica and Eunhyuk could just be friends