KHR Spoilers for Gumi if she is interested. Highlight to read:
Inheritance Ceremony Arc - Tsuna is supposed to officially become the 10th now and a ceremony will be held. A lot of other mafia peoples were invited, including the Shimon Family. Which is a fairly unknown and weak family. Tsuna and his guardians get to know the Shimon family and become friends. Then Yamamoto finds something that one of the Shimon family dropped. The guy the proceeds to kick Yamamoto's ass and send him to the hospital. Tsuna, angered by this decides to go through with the Inheritance Ceremony to try and find out who hurt Yamamoto. He has Chrome make an illusion of Yamamoto so no one would know what happened to him and to try to surprise the people who did it in an attempt to draw them out. You later find out it was the Shimon family, and they steal the Blood of the First. They say they did it because the First from both their families were friends. But that Giotto betrayed the Shimon and the first Shimon ended up dying. Tsuna and his guardians go to fight the Shimon family and get their asses kicked in 5 seconds. Then their rings are broken, and Chrome is kidnapped. Then magic old person comes claiming he can fix the rings. So he does. But when they get the rings back it is only a lump of metal. They have to try to activate the rings for them to take shape. Tsuna, Gokudera, and Ryohei activate theirs, Hibari wanders away, and Lambo is an idiot. Eventually they are able to locate the Shimon base. The sail there and run into the people from the first arc that arrested Mukuro. I can't remember their name... They proceed to tell both Tsuna's Guardians and the Shimon family that they have to fight to find out the truth of what actually happened. The losers are taken away. The magic prison people disappear, and Tsuna, Ryohei, Gokudera, and Lambo are left alone with the Shimon family. The Shimon family try to leave, but Tsuna goes into Hyper Dying Will Mode with his awesome new gloves and ring. He tries to stop them but they get away. So Tsuna and the gang end up trying to get the the center of the Island. They soon meet one of the Shimon family, whose name I can't remember. But he is the equivalent of Ryohei, so he fights him. The match ends in a draw and they are both taken away. Then a memory of the past with Giotto and the first Shimon is seen in everyone's minds. And that's how far it is now. Also, the Shimon family has the flames of the earth, rather than the sky like Tsuna and his guardians.