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Equal contract?
Similar to being a Family?
"Are—are you serious?" Duan Jia Xu turned to look at Luo Huian. "You don't need to do something so dangerous as that for me." If she became his family by a contract then Luo Huian would certainly be in danger as people would target her.
As he was an S-rank hunter now, it was only normal for him to get involved with a bunch of people. Who knows how many enemies he would make in the future?
What if Luo Huian was harmed because of him?
"That's right!" Luo Qingling turned to look at her sister and agitatedly spoke in a harsh voice, "Do you think being a custodian is all fun and games? What if you are hurt while protecting her? Why do you have to protect someone when you cannot even protect yourself!"