Katekyo Hitman Reborn!

After a long discussion, it is decided Tsuna and his friends rest for the first few days before commencing training for the battle of Choice in ten days time. At the Vongola base, a ring signature was caught on radar and Tsuna and his friends investigate. Tsuna and his friends find Basil from ten years ago to be the cause. At the Vongola base, Basil explains he was sent to the future ten days ago and was given a ring, a box weapon, and a book containing information about his situation and orders to assist Tsuna and his friends.