If you're looking for manga similar to Show By Rock!! Short!!, you might like these titles.
Tsumugi, manager of the seven unique members of Idolish7, is pulled left and right by the energetic boys!
Yui Asahina, a violinist who failed to enter into the music department of Seiso Academy and went on to the General Education section, meets Ginga Ichinose, who is aiming to win the "International Student Orchestra Competition.
The "idol-training produce game" takes place at a private boys' idol-training school with a history of turning out many great talents in show business. The protagonist is the school's lone female student who transfers to the school because of a special situation, and enters the school's producer department.
When high schooler Kanade Sora takes her classmate Otoha Yamana to their first rock festival, the experience is greater than they can even imagine. It's a new life of rocking out!
To save the world from destruction, a Master, Gudao, summons Heroic Spirits and fights together with them. He tried to learn more about the Heroic Spirits to understand them better and deepen their bond, but it was too difficult to learn and he understood nothing... That's why, let's get the heroes themselves to teach him about their history and legend!