I feel like with every season, this show gets even better and the budget goes absolutely nuts. (spoiler videos)
This season is mostly the Harvest Festival, but he do have some training montage stuff in the beginning where Iruma finally learns how to fight! Bachiko is a fun character, and we spend more time developing her and Iruma this season than before. Iruma, separated from his friends as he works hard to develop his new skills, has to eventually face his Trauma.
This season is all about CHARACTER DEVELOPMENT, and I love it. Everyone in the class gets a chance to shine! Everyone is so cool! I’m so sad I caught up…
I know I’ve added the harem trope here, but I really do hesitate to classify it as harem since the female characters are so well-developed compared to your standard harem.

I still did it, though.