This is a all-age game: VNDB , romanji: Idol Mahou Shoujo Chiruchiru ☆ Michiru

Description
Matsushima Michiru is an unpopular Idol whose dream is to someday become as famous as the admired idol, Kazami Kazuki.
One night, while looking up to the sky, she saw a falling star and wished upon it to quickly become a top idol.
However, the falling star turned out to be the familiar cat Nyanmel, who came from a magical world, and in order to save the world, he told Michiru that she would have to become a magical girl.
The game will have an anime-alike format in 13 episodes, divided into two games: first part contains 7 episodes and the second part contains 6 episodes.
One episode will also be included with the PS Vita version of Grisaia no Meikyuu.

Thank you so much!!:)