Harassed by Myself from a Parallel World [Crossover]

Mr. Nakahara, an executive of the Port Mafia, never imagined he'd one day meet his parallel-universe self. Five foot one, ninety-nine pounds, and... a woman. She wore a beautiful black dress. In her left hand, she led a little boy who looked just like him, and in her right, she held a little girl who looked like his bandage-wrapped partner. She radiated maternal warmth. From then on, everyone started looking at him differently. A certain rabid dog: "Got it. When are you two getting married?" A certain boss: "Have you ground the diamonds into powder yet?" A certain big sister: "If you really want to be with him, I wouldn't object, either..." Even the other person involved, who'd just returned from a business trip abroad, looked horrified when he saw it. He pointed at him as if he'd encountered a living urban legend. "Nakahara, you can have babies?!" Mr. Nakahara: Pah! If anyone's having a baby, it'll be you! Mr. Nakahara: ...Wait! Why would I have a baby with you?! Theme: Cherish the present and take responsibility for yourself and others.