Sawada Tsunayoshi and his guardians have returned to the world ten years ago, but... Will the days ahead really be peaceful? Hibari Kyouya's sister and her friends suddenly appear, and it seems that they have an unknown secret... Arcobaleno's new Sky Messenger is actually Tsuna's cousin? ! At the same time, Irie Shoichi from ten years ago received another letter from Irie Shoichi ten years later, and Tsuna and the others came to the world ten years later. For love, she joined Milu Fiore and became the Six Flowers of Cloud; for love, she kidnapped Arcobaleno's sky messenger... Is Yuni resurrected? Arcobaleno lifts the curse? Bailan makes a comeback? Ten years later, the Simon family has shaken hands with the Vongola family and decided to fight back Milufiore and save the world. But she is still obsessed with it, and fights with her enemies to defeat her family... In this war-torn world, besides fighting, will there be love? Vongola and Milufiore seem to still have many problems to solve... Everything seems to be back to before...