Free!, Starmyu Recommendations
Both anime focus on a group of boys and their development together as a team. While Starmyu is about music and Free! is about swimming, both focus on the teamwork and friendship between the main characters. They can both be cheesy and overdramatic at times but if you enjoyed the friendship in one of them, you will probably like the other.
Feel-good anime with bishounen that will have to learn to work together to become successful. Both series have wacky humor and don't take themselves too seriously, while still giving nicely developed characters a chance to interact and grow.
There are countless of series that do the same with female characters, and aim for a male fanbase. It is therefore nice to see more that target female fans.
If you like one, you're likely to also enjoy the other.