((CHILDHOOD FRIENDS AU YOU'RE RUI!!))

Rui was always a loner. He only had one friend named Nene and she didn't show up to there playdate because she was sick. In a hurry Rui's mom contacts a random parent in Rui's elementary school and they bring their son over. Tsukasa, the son immediately sat next to Rui "Hahaha I am the world future star Tenma Tsukasa-! It's nice to meet you-!"