Oshi No Ko: I, Hoshino Jou, Will Become Chairman

(The Boss Baby + Oshi no Ko)

"Contains some original elements"

(The protagonist's personality may not be very likable at first, but it will gradually change as the story goes on.)

A reincarnator and also the child of the popular idol Ai Hoshino, Aqua and Ruby were now old enough to take care of themselves. He thought their lives would continue in the same peaceful, warm way, until one day an “unexpected guest” suddenly barged into their lives...

Ai Hoshino held a baby dressed in a tiny suit, its expression faintly disdainful, and said to Aqua and Ruby, “Aqua~ Ruby~, come meet your aunt.”

Aqua and Ruby: “Huh!”