My wife was hospitalized for her first childbirth. My wife's sister, who is caring and worried about us who are not used to raising children, came to stay overnight. She's a youthful, baby-faced sister-in-law, even though she's in her 40s. She's an adult woman, but she has a slim figure and is beautiful... Because my wife isn't here, I'm already frustrated... I wonder if I can endure life with my sister-in-law...