I've said it once and I'll say it again: The manga is funnier than the anime. The characters are more reactive/expressive, like Gosha here. "Is it my fault that you've become a delinquent!?" He's genuinely worried about Legoshi dropping out and he feels like it's his fault.

There are funny familiar interactions that show how long it's been since they've seen each other, like Gosha needing reading glasses, drinking alcohol now, how big Legoshi has gotten.

A callback to the advice Gosha gave Legoshi to put money in his shoe, a joke about his night with Haru, fitting it all back in the narrative so we don't forget about Haru even in a scene with Gosha:

And, the conversation they had AFTER the fight. Legoshi, now no longer a kid, understands the difficulties his grandfather went through. He feels like he doesn't know him as a person. This is just such a genuine interaction and I feel like we can all relate as we get older and realize our grandparents/parents are people with their own problems.

This led to my favorite panel from the whole manga, I can't believe they cut this:

This whole story, we've never known Legoshi's background, why he is the way he is. Now we meet the reason why, and it feels natural, not forced. And his grandpa will support him no matter what.

THEN, as a parting word, Legoshi drops on Gosha that he's dating a rabbit, and it's hilarious, and shows more vulnerability between them, this was one of the funniest moments in the manga why did they cut this!?!?

The scene was incomplete after the fight, they had more to talk about and reflect on, it left both of them learning about each other and feeling grounded. I love Gosha as a character and this is partly why.