Kimi to Boku., Free! Recommendations
The focus of both series is on slice-of-life and the daily lives of high school boys. They have similar humor and characters and the same "feel."
Both are about a group of childhood friends and their high school lives.
Kimi To Boku. and Free! both focus on a group of guys in their teens. They are also similar in terms of how the plot shows how they've grown from their childhood to the present. Also, there is a supporting female role in both anime that eventually affects the group of boys.
If you liked Kimi to Boku, then you're absolutely going to love Free! But why?
Because all of them are about childhood friends that grow up together or semi-together, they are both slice of life anime but Free! is more of a sports show than Kimi to Boku, and the songs of the anime are amazing.
The Kimi to Boku singer, cute voice and all, and Free!'s singer, Old Codex, are amazing J-Rock singers. Just give them a listen!