He is the strongest weapon of the night watchman! The killer of the world! Three years ago, on a special mission, he was seriously injured and lost his memory! He was saved, and in order to repay his kindness, he married the benefactor's daughter! For three years, he has worked as a cow and horse for his mother-in-law and wife, but in their eyes, he is still not as good as a dog! Finally, his memory awakens and the king returns!