Katekyo Hitman Reborn!

With the reveal that their foe wasn't the real Mukuro, everyone breaks into the Kokuyo Middle School building to face the true mastermind. With no Dying Will, Gokudera having to fend off both Chikusa and Ken, and everyone else unconscious, all hope looks lost, but one of Mukuro's captives my prove to be the ace in the hole.