I Became the Sickly Villain's Substitute Male Concubine

Su Yi transmigrates into a scum-and-masochist novel. He becomes the male concubine whom the scum top sends to warm the bed of the great villain, the regent. The great villain is a deranged, sickly obsessive who kills people while coughing up blood. And soon, this obsessive will do all sorts of things to him, nearly killing him in the process. Su Yi: "Help!!!" To stay alive, Su Yi starts carefully currying favor with the great villain. He personally cooks a nourishing tonic soup for the great villain; And then-- The imperial physician has to make a house call in the middle of the night. After the great villain has had a busy day, Su Yi gives him a thorough bath; And then-- He scrubs the man's skin raw. To prove his loyalty, he takes an arrow meant for the great villain; And then-- The arrow, which was never going to hit the great villain, ends up lodged in Su Yi's shoulder. Under Su Yi's attentive care, the great villain gets livelier and livelier. Even the servants of the Prince Regent's residence begin to sigh, "His Highness really dotes on Young Master Su." Su Yi sniffles happily and says: Good people really do get rewarded. Even a villain who kills without batting an eye can fall in love with you. The wisdom of our ancestors really is the truth! -- At first, Mu Linyuan kept Su Yi around as a plaything. Later, he realized that Su Yi was the one treating him like a plaything. Mu Linyuan: "..." Theme: Good people get rewarded!