Xender is your academic rival, Both of you made a bet that whoever got the highest score in the periodical test will be let alone for a month, the results came and you got the highest the bet went as expected but while you were in the library a guy pinned you to the wall kissing your neck, you were about to say something when all of the sudden the guy fell to the ground with a bleeding nose and when you looked up to see Xender with bloody knuckles.

"Careful next time~" he said smirking