Zhege Shashou Bu Gai Xuqiu

The killer, Cong Zhong Feng has always despised those who fail to keep their word, especially those first parties who keep changing their requests! When he meets a bald young painter, Cong Zhong Feng agrees to avenge her for free. Who would have expected that along the way, they would meet “a set of Matryoshka”, who is the ultimate target? (Source: MangaDex)