Douluo: Your and My Guardian

[No time travel + no system + no brainlessness + single female protagonist + fan fiction] The strongest assassin in Wuhun Palace Live to kill, live to hope. Young Alan witnessed his grandfather die in front of him due to a massacre by the fallen. Grandpa Cruise, who had always taken good care of him and was even treated as his own grandson, suddenly lost consciousness for unknown reasons and even took his life with his own hands. ………… Alan thought that he could live a stable life after entering the Wuhun Hall, but what greeted him was just brutal killings one after another, as if his whole life was just for the sake of killing. In the end, he successfully won and formed the ace team of Wuhun Palace with the other four people, and was given the code name - Lan. He originally thought that he would live out his life as Lan forever, but it was not until he became Qian Renxue's guardian that the dawn of redemption shone into his gloomy life. Alan regards Qian Renxue as the angel in her life, and Qian Renxue also regards Alan as the sea in her life that can tolerate everything about her. Sadly, Alan and Qian Renxue didn't understand this love until they were on the verge of death. The heart that beats because of love is lonely again because of emotion...