This is such a weird doofy anime game. Getting this out of the way, if you were looking for a mashup of SMT and Fire Emblem, you'll be in for quite a shock when you see an extremely lighthearted RPG that centers around idol culture. It definitely has some elements from both series like the Sword-Spear-Axe rock-paper-scissors system and all the spell names from SMT plus a familiar turn based random battle gameplay that SMT is known for, but this story is really a beast all of its own. It's basically a pastiche of anime and follows so many tropes to a T. The characters are actually really likable and you get to know them a lot more than some SMT characters (cough cough Nocturne and SMT V). But for what those games lack in story and characters, they more than outclass Tokyo Mirage Sessions in an addicting gameplay loop and fun yet challenging battle system. Tokyo Mirage Sessions doesn't have a bad system at all, it's just kind of vanilla and battles usually play out the same until the final two chapters, that's when you got to really think about what you need to do reach turn which is pretty fun actually.
It's a relatively short experience for modern RPG standards (50 hours), but it doesn't overstay it's welcome and never takes itself too seriously. It's goofy, charming, and a fun JRPG experience.