What if Tsuna has a twin? What if his family abandoned him? What if tsuna was sold by his parents to became an experiment of the Estraneo famiglia? what if the Estraneo famiglia erased his memory? what if his parents and twin regreted what they did to him? will tsuna remember them or forget them permanently? will tsuna be the sky that accepts them again? or will the sky become too dark to even accept and forgive them?