The series are based around running, but it's so much more than just that. I'm not a sports fan or a fan of running but I really enjoyed this anime. It has different characters with different goals and view points in life yet they all learn from being together and doing the same activity - running.
The first season (12eps) is preparation and after that it takes off into a pretty thrilling ride of how it will all pass out. The series are great in showing a lot of variation with scenery and changes in characters (not big, but still there to be admired).
There's drama, comedy, life problems and a lot of philosophical thoughts about life and how running affects each one of 10 POVs. Also cute doge is a great addition. Personally I'd love to had deeper characters and make it more dramatic, but this anime makes it seem that you're passing them all by quickly (characters) just like in running you can't sit still and observe, you just go forward and gain as much data as you're capable.
So yeah this series is pretty refreshing and very nicely paced left me unbored and interested to keep on watching. All I miss is more of depth, but it's just so swell that I don't really want to put on a sh1tty mark. It's very light and I enjoyed it very much. Though ngl there was a lot that could have been covered with the drama aspect making it a 12/10. Oh yeah and the anime is actually pretty wholesome without school-life which is very epic that we didn't get flushed filler content and just enjoy the characters and the story.
I also absolutely loved that this anime isn't about "push yourself and be the best" like most sports anime or overall like "shonen", it is actually for an audience that wants to use their brain and think things through and just enjoy themselves while doing something that they might not enjoy doing.