Sketchbook: Full Color's, Kimi to Boku. Recommendations
*Slice of life, comedy, school
*cute, heartwarming, friendship, teenagers, a group of friends
*there are cats! in Kimi to Boku as ambient around and in Full Color with more dialogues between them.
The only difference is Full Color is about girls and Kimi to Boku is about boys and has a little more romance.