Love on Target

An incompetent assassin from the infamous Assassins Brotherhood Syndicate (A.B.S.) is assigned a mission to kill the daughter of the richest man in the country. He has to infiltrate her school and bypass her bodyguard that graduated from Bodyguard University of Tactical Training (B.U.T.T.) to get a chance to do so, but then he inevitably falls in love with his target… Source: Webtoon