From Udon:
The action continues for the united casts of Persona 3 and 4.
It began two months after the end Persona 4, when the Investigation Team was promptly swept up in a strange fighting tournament run by the mysterious General Teddie. After a long series of vicious battles, the Team defeated the mastermind. But the peace hasn't lasted long. General Teddie returns and proclaims the start of the P-1 Climax. Then there's the mysterious boy Sho Minazuki, and even Tohru Adachi joins the tournament. Where will the story go next?

Based on the fighting game, Persona 4 Arena Ultimax.