Sawada Tsunayoshi was 27 years old, Bai Lan wanted to rule the world, and Vongola was betrayed by Kiri Shou-----Hoshino Ruriko, and all of them died in battle.
When he opened his eyes, the leader was 17 years old again - the second year of the inheritance ceremony, and got a memory of a parallel world.
Goal: Retrieve Wu Shou ------ Six Paths Skeleton.