The Rabbit Just Wants to Know If It’s Unrequited Love, All27

Tsuna was rescued by Hibari when he was four, then, through a series of misunderstandings, became Hibari’s pet. Ten years later, Tsuna can’t remember who rescued him back then. He falls for Hibari, but because of a whole lot of misunderstandings, he thinks his love is unrequited.

This is a parallel world to the original, one that can function without the Tri-ni-sette, so the Arcobaleno are all adults. The Vongola Rings still exist, though.

Also, in this story, Giotto is Tsuna’s grandfather, and he is also the first-generation Vongola boss.