Tsuna is finally having a vacation from Vongola for a whole summer vacation even if Reborn is staying with him, he is going to visit his two favorite cousins, Honoka and Kenichi. But as his terrible luck had it and Reborn meddling, he is going to be force to become a new disciple and be brought into a whole new world, with Yami, Yomi, and of course Ryozanpaku

Two boys once as close as brothers. One trained by Heroes to fight and protect. One trained by Criminals to kill and lead. Both striving for a better world. Can their friendship survive the clash of their two very different Justices? "I fight to protect what I value precious, what right do you who was raised in the light have to judge me Ken?" Kenichi Universe(No Dying Will Flames)

Nana cree que Tsuna y Reborn necesitan vacaciones, asi que para el descanso de verano del ultimo año de secundaria de su hijo, Nana le pide a su prima favorita que los reciva. Tsuna esta emocionado, hace tiempo que no ve a su primo Kenichi, pero quizas hubiese sido mejor que se quedara en Namimori.

Tsuna goes to visit his cousin, Kenichi during the summer break. And they end up... fighting? Kenichi X Miu I apologise if any characters are OOC. (Cover picture isn't mine. And neither is KHR or Kenichi: The mightiest disciple)

Vongola cause a lot of destruction wherever they go even though they're the good guys. Kenichi and co mistake Tsuna and his Guardians for bad guys because of this unfortunate trait. See what happens when the Vongola become the shadowy gang, The Destroyers. Not my best summary I know.

Tsuna Sawada and Kenichi Shirahama are cousins. See what happens when Tsuna becomes the second disicple of the dojo Ryozanpaku