Bright and happy JRPGS?

I recently had a great time with Super Mario RPG. The world of Mario is such a comfort for me, but the stories of his games (while having a lot of good ideas) are always just an excuse for the gameplay, so I wish there was some more meat to it.

I would love to play something that is similarly happy and upbeat, but with a heavier focus on the story and making me invested in the characters. I don't mind if there's some heavier stuff further into the game, Undertale is my favorite game for reference, and I a meaning to get into Earthbound at some point.

Really, I just want to play something that makes me smile and feel happy.