Uma Musume No Nama No Ouchi No Maki-kan!

[An ensemble drama (more accurately, a long-form episodic series), no main character, lighthearted slice-of-life, parallel worlds, light main plot.] Incidentally, this work is also known as "The White Horse Register"... 'Horse racers—they are born to run. They have names from another world, names with turbulent lives or glorious histories... They run, inheriting those glorious souls, for that is their destiny. But for the horse racers of this world, the future is still unknown! Right now, all they see is the finish line, and they will never stop until they reach it!'