[Crossover] I Just Want to Be an Ordinary Person

My name is Makoto. Or perhaps I should say I used to be Zenin Makoto. After saving one worldline, I thought I could retire, but when I opened my eyes again, I was in a new worldline. Thinking back on everything I'd been through in the previous worldline, I decided to lie flat and stop trying. Being head of the Zenin family was exhausting. Whoever wants the job can have it. After careful consideration, I chose a path I'd never tried before... First thing, I get myself a dad! Huh? Why does this dad already have a son? He's not his biological son? No problem, I'm not his biological kid either! After getting a dad, I'll get myself a big brother too! Me: "Bro, are you going to inherit Dad's estate someday?" New big brother: "The estate? Oh, you mean the detective agency... Whatever. If you want it, you can have it." Me: "???" At the time, I had no idea that the man with the topknot in Tokyo and Gojo Meow had gained memories of something that never happened. The Zenin family's eldest son woke up one day and started questioning his life. A certain tyrant rubbed his temples in confusion. Then those people, all carrying memories that didn't exist, came and stood before our family together. Rainbow Piggy: "Are you my big sister?" Topknot: "So you're my girlfriend?" Gojo Kitty: "The person I like is actually an ordinary person?!" That guy with the curse: "Megumi's waiting for you to come home for dinner." Help, I just want to be an ordinary person! Theme: Can you let me be an ordinary person?