Sawada Tsunayoshi, tenth don and Neo Primo of the Vongola Famiglia has tasked his male mist guardian to investigate one Amatsu Gai. And as Vongola luck would have it, a simple infiltration mission turned into a full-blown fight between Kamen Rider Thouser and Rokudo Mukuro.

Geiz and Tsukuyomi meet someone who believes that the present Tokiwa Sougo is innocent, but the time travelers wholeheartedly disagree.

Lambo witnesses the future ruled by one Ohma Zi-O by way of his Ten-Year Bazooka. Naturally, he reports this to his older brother figure, the current head of the Vongola Famiglia, Tsunayoshi Sawada.

Ciaossu A new legend for a new time and world is born. The King of riders who inherits the legends of those before him. Only the ultimate Hitman can train such a figure to be a worthy heir to these legends and lead as Boss. The Rider King of the Vongola, Kamen Rider Zi-O! Go beyond Space-Time with your Dying Will!

Dying Will Flames are said to be fueled and controlled by the user's desire, so what if a certain soon to be mafia boss gains the powers of the Multi King? How would Vongola deal with the results of this event? (AU in which Tsuna becomes a Kamen Rider.)

The seal that the Ninth Vongola Boss used on him may have seemed like a good idea at the time but it would have put Tsuna in danger for the rest of his life. To defend their host, the Sky flames split into the 6 other flames. Together with the Earth Flames, these 7 flames would protect and guide Tsuna at any cost, no matter the obstacles