Game of Thrones: From the Start, I Summon the Fiercest Warriors of the Three Kingdoms

Lin Lei, a young man who transmigrates to a small town in the North of Westeros, marries into the local baron's castle as a son-in-law. The familiar names and setting make him think he has arrived in A Song of Ice and Fire, but he later discovers that this is a mutated world of swords and magic. In a dog-eat-dog world full of danger at every turn, Lin Lei activates the General Summoning System and carves out a domain of his own.