Aunt Xiangzi, how did you manage to live?

"Aunt Xiangzi, didn't you pass away?"
Ruo Yexiao, Mu's adopted son, a famous second-generation star, and the most watched chosen idol of the new era—he travels back to his mother's high school days and meets Toyokawa Shoko, who had long since passed away in his memory.
In my memory, the great Aunt Xiangzi met with an accident not long after the disbandment of the C group. Like a whale falling and all things coming back to life, her passing inspired everyone. Carrying Xiangzi's last wish, the group walked side by side to the top of the music scene.
...Wait, what is Aunt Xiangzi doing? What is a hen card?
I will save my mother from her regrets!
You guys have to be in a band for life! If Mother Hen Card tries to steal Aunt Xiangzi away from my mom and all the other aunties, I'll just steal Mother Hen Card away too!
But as Xiao got to know them better, he discovered that these "aunties" seemed a little different from the ones he remembered...
"Su Shi, you can't do that kind of thing!"
"Lixi, you're the aunt I pushed, this isn't right..."
If Ye Xiao discovers that he seems to have unknowingly become the core of a terrifying gravitational field.
"Don't be afraid, Akatsuki!" At the crucial moment, Banai saw Anzu descend from the sky. "Your system is in my hands! How can my plan to raise a handsome boy be interfered with by others?"
"—System! Give Xiao some points!"