You are Toyokawa Shoko, then who am I?

Toyokawa Sho never felt happy about paying off his huge debt and reaching the top of the circle.
When he woke up, he found himself back in time ten years ago, holding a girl who looked very similar to him in his arms. The two looked at each other with deep confusion in their eyes.
after a while--
Toyokawa Shoko: "Don't think I'm afraid of you just because you're from the future! When it comes to live performances, I'm not afraid of you! When it comes to writing lyrics and composing music, I'm better than you!"
Toyokawa Sho: "Okay! Let's go to the street to perform tomorrow. We'll each recruit people to form a team. Let's see who goes home victorious and who is wiped out!"
After a while——
Toyokawa Shoko: "Oh my goodness! If you want to get the tonic from me again, at least leave Mu to me...!"
Toyokawa Sho: "You are a person who only thinks about your own affairs."
After another period of time.
Lao Xiang: "I heard you have a cat, where is the cat?"
Band girls: "Niao...♡."
Lao Xiang was horrified: "Hey! No, no way! Why are you bothering me instead of going to look for Toyokawa Shoko?!"
Everyone: "Xiangzi? No need!"
At this time, Daxiang: "...Why hasn't that idiot come back yet?"