While looking through my references I found one that reminded me a lot of Nagatoro and the run training story:
https://www.pinterest.com/pin/256986722474598315/

The Nagatoro anime has finally released. They did a good job animating it. The coloring style is also pretty good, although there are some instances that they want to add more details to Nagatoro’s hair but it looks a bit too digital? Although it’s 2D, it somehow looks cg. The hair effects to make it more detailed need some work or needs to be stylized differently, or maybe using different colors might look better? Other than that though, I’m loving the voices they chose, Nagatoro’s fits perfectly. Wonder what the opening is going to be like? I wonder if making those transition segments are going to be common place? What I mean by this, sometimes when they make a transition some cute Nagatoro cats and Nagatoro appear. The other anime that I have seen doing this was in Demon Slayer. If you guys know what I’m talking about, let me know if this is becoming a popular trend in other animes.

This was painted with Corel Painter 2020 using the Sargent Brush and oily brush. It took me 2 hours and 22 seconds.

Hasta la proxima,

-NUBE