Arcobaleno's Hero Academia

In a world where the Arcobaleno curse does not turn those cursed into physical toddlers but does stop them from aging, Skull and his fellow Arcobaleno slowly grew closer instead of splitting apart after the Fated Day. However, the curse was stronger, unwilling to be broken while in effect. After finding an alternative to the curse, they were to be the last generation. They had a good run, truly. But eventually the curse consumed the last of their flames, killing them one by one. Skull was the last one left, with the exception of Yuni, and when his flames finally ran out, the last thing he expected was to open his eyes to see a hospital room.