The One Who Carries Mother's Will

In the original canon episode of "Oshi no Ko", Ai Hoshino, the popular idol, got stabbed by her killer that was called "Ryousuke", leaving her twin children Aqua and Ruby behind at a young age. But this time as non-canon, what if you are time-traveled to see your mother again to prevent her from going through the same pain again? You are her child, the younger sibling of the twin. Begins going back in time.