Reborn in the Doomsday, My Wife and Sister-In-Law Take Me to Survive

(Slow heat + funny + multiple heroines + pretending to be a virgin + the heroine is perverted) As soon as he was reborn, he faced the problem of swapping the identities of his wife and sister-in-law, and then the end came. I thought that relying on myself as the male protagonist, I could easily cope with it, pretending to be a slap in the face, or struggling to develop. However, a Madonna system was activated. She could not harm others and had to rely on rescue to gain points. I have no choice but to follow the women. When they make a move, I stop them. When they stab me, I bandage them. However, I have no control over whether he will be beaten again after saving him. I am only responsible for saving him.