1 : Feelings [Naruto one-shot]

Little Naruto met a weird girl.

Little Tsuna was saved by his scary neighbour.

A strange civilian took in Mukuro and his gang.

Katsuki Yuuri has a hyper childhood friend.

Shinsou somehow adopted to be a stranger's son. (even though he has a father.)

That suspicious senior in Conan's school.

and many more that maybe written.