Strangers (Ni-ki FF)

Lee Y/n, the high school girl and the school's bad boy, Nishimura Riki were once friends. But throughout the years, Ni-ki changed. He got detached and ignored her whenever he could. Y/n did the same, as she couldn't cope with his behaviour. This caused them to become enemies, and act mean towards each other.
As time goes by, Y/n seems to have many guys wrapped around her fingers, and Ni-ki doesn't like the fact that they are drooling over his ex-bestfriend. He suddenly becomes protective over Y/n, surprising her. He also surprises himself, as he can't believe he is trying to snatch Y/n away from everyone who is in love with her. Will this bring them closer? Or make them feel even more hatred towards each other?
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"Why do you always do this?" He asks
"Do what?"
"Constantly flirt with your admirers."
"Why is that a problem to you?"
"It drives me crazy, to see them around you."