Tsuna receives the Vongola Box from Irie. However, Irie shockingly tells him that in order to draw out the true power of the Vongola Rings and open the Vongola Box, the Seven Arcobaleno Seals are needed. In order to obtain the seals, Tsuna needs to overcome the Arcobaleno trials. However, in the future all of the Arcobaleno, besides Reborn, are dead. Tsuna doesn’t know what to do. Irie says that he'll momentarily send Tsuna and his friends into the past so that they can retrieve the seals.
That's why you're returning, for now.
ist dieser Zwischenschritt notwendig.
Por eso regresarás por ahora.
Por eso vas a volver por ahora.
Para isso, por enquanto voltarão para casa.