Here a little continuation of my last drawing.

Haru and Hageyama forgave each other and now are good friends, despite Hageyama still feel a little scared of the little Haru.
Haru even call him as "Hageyama-senpai".

Both of them recounter each other in the gym that both of them frequent.
Like the tittle of the drawing said, life is too short for some grudges. Although Hageyama and Natsu still don't get along.