They had turned their backs on him... After that fateful day he had killed... They looked away from him. He then wishes to go back to the time when his friends wouldn't fear him... and the next thing he knew... he was back in his old room ten years ago...

Giannini tampers with the box animals, which leads to them becoming human and being free of their ring forms. Until they find a way to return them to normal, Tsuna and guardians must take care of them, which leads to a whole host of misunderstandings.