I was plotting against Hoshino Ai but was pushed back

When Saito Hiko was twelve years old, he met Hoshino Ai, who had just decided to become an idol.
Only then did he realize that he had traveled to the world of My Favorite Kid, and it was the day when Hoshino Ai had just decided to become an idol.
That is twenty years before the story of Aqua and Ruby going to high school in the anime.
He was still unhappy with the original direction of the love story.
So she decided to change her destiny from then on.
Accompanying Hoshino Ai so that she is no longer alone.
And when he has time, he will investigate the mastermind behind the original plot and make sure he gets the punishment he deserves.
But since he only watched the first episode of the anime and was reincarnated into this world without any more clues, he could only investigate step by step.
(Kamiki Hikaru will definitely die, and his ending will definitely make you feel the most relieved. I mainly want to write about daily life, so there will be very few appearances of scumbags. He will only appear when he is about to face the most tragic end.)