Fallen Saints of Tennis (KHR x POT)

Sawada Tsunayoshi died in the curse of Arcobaleno which unknown to them except him crawled to his lifespan after he broke the curse to the 7 babies

Every Mafioso that respected him even Checkerface, Kawahira whom tsuna called, "Uncle Kawahira", was very shocked that the curse has it's own ego

That day, when he not only failed to protect a civilian kid that was targeted by an unknown man. But he was taken by the curse he knew and a bullet on his heart.
Was the day he first met his distant-relative second cousin from his mother's side. That very child he failed to protect

Wishing to have a chance to protect his second cousin and to apologized to them for dying

The ego of Dying-will flames itself heard his wish and decided to help the young don of Vongola

"Tsuna, live free away from Mafia in this new life of yours" Tsuna heard Primo's voice with a hopeful tone wishing Tsuna won't have the burden of the boss. But as a civilian person living in this cruel yet beautiful world. The ego decided to give the First Vongola Don a chance as well

"One will granted to this Don's wish; Selfish for others yet takes all the pain.
One will granted this young Don's wish; Selfish for others yet forgave the pain they gave.
Like Ancestor, like Descendant; One will grant you new life in a world you knew yet not.
Both of you may live in new life as new you.
In the name of I, "Heart", gifted you this for protecting me and this world." a voice whispered to Tsuna's and Primo's soul before it send them to the Another World while both of their mind's are all blank with the last words

*somewhere in another world*
"Anata... look our twins... i'll name the older twin Ieyasu and the younger twin, Tsunayoshi just as you suggested" a female voice whom both of them very familiar of, Sawada Nana crying while holding the twins with a Fedora laying down on her lap

The two we're looking to the familiar fedora

'HIEEEEEEEHH??!!!!' our poor twin protagonist silently shriek in shock mentally