IDOLiSH7, A3! Season Spring & Summer Recommendations
Although Idolish7 is an idol anime- the formula is very similar to A3. Both stories don't focus on romance at all and instead focus on a female character helping a male cast get better and achieve their dreams while the male cast gets closer and become friends throughout!
A3 does focus more on the acting and getting better more than Idolish7, while I think Idolish7 focuses more on the friendships, drama, ect between the guys.