The Ceo's Daughter Clings to Me

A young boy is a generation of killers who frighten his enemies. During a mission, he was stabbed in the heart by a woman he trusted. But the strange thing is that he actually traveled through time. Before he chose to be a killer, he also had a childhood sweetheart sister (not related by blood). This time, he did not choose to become a killer, but chose to wander around the city with his sister. My sister clings to me, and if I meet the woman who made him die again, forget it!