7³ is the 88th episode of the Katekyō Hitman Reborn! anime series.
Hibari decides to let Tsuna live, wanting to fight Tsuna when he is finished training. The history of boxes is explained thoroughly by Hibari. Whilst Hibari is explaining, Bianchi is also explaining everything she knows to Gokudera. It is said that the boxes were made because of coincidence and sold at extremely low prices. There are more than three hundred designs. Meanwhile, Byakuran reveals the 7³ plan; the 7 Mare Rings, the 7 Arcobaleno's Pacifiers and the 7 Vongola Rings that will give them the ultimate power. Squad 8 is sent to investigate deaths in Japan.