Hibari Kyoya, Protector of Namimori, resident BAMF, just don't ever EVER explain what the last two words are. There is a story behind that. Updates are sporadic but this story is not abandoned. Also, see Adoption:Sidestories.

Reborn had never disagreed with any of the ninth's decisions, but when the Vongola boss sent him to Japan to train Sawada Tamaki, the hitman started to think that the ninth had chosen the wrong twin…

...or how your average otaku manages to trip, die, and come back as Tsuna's twin sister. Add in a certain snarky Kurokawa and a baby hitman with the mother-of-all happy-trigger-fingers and you've got a recipe for disaster. [DISCONTINUED, REWRITTEN AS 'RENASCENCE']

Nine years into the future of the Vongola before they changed it. 1827, 8059, and others.

No Good Tsuna was useless at everything. He got poor grades, barely has any friends and generally, was a loser. But what if No Good Tsuna was only pretending? GuardiansXTsuna, 8059, RebornXLambo

AU – Sawada Tsunayoshi was already content with his newly gained friends and family in the Vongola. So, who was this new student entering his school and why was Reborn so adamant about making said student become Vongola Decimo's advisor?

Sawada Tsunayoshi was unassuming. Resourceful. Surprisingly adaptive. And his hyper-intuition hasn't been wrong yet. Regardless, he didn't need that indication of doom to know that Reborn was the harbinger of utter chaos. WIP

AU – Prequel to Conundrum and Sort-Of Sequel to Paradox. It was just another moment at the world's greatest hitman's household. Pure chaos and insanity. Paradox-verse: FemHarry.

In a world where magic doesn't exist, a normal Harry Potter goes to Namimori in able to escape from his relatives. But then he meets the crazy baby Reborn and Sawada Tsunayoshi... Varia Arc now complete!

When a girl from our world takes advantage of a quirk in the reincarnation system, guess whose body she ends up in? See what changes when the stupid cow isn't so stupid - nor a cow. What else will change when she retains knowledge from her previous life?

At age twenty-six, Sawada Tsunayoshi dies without regret, leaving his place as Vongola's leader to another. In another world, Sawada Tsunayoshi wakes up once more: alive, de-aged to ten, with a younger twin brother, and ... female? …What? - AU; dimension-crossing; fem!Tsuna; No pairings as of now.

While many grand accomplishments decorate the high reputation of the new Academy City, Namimori, many mysteries shroud it as well. Mysteries that even Reborn is becoming hard-pressed to solve while he tutor the eldest 'twin' of Sawada Iemitsu, Ieyoshi. Fem!Tsuna who begins OOC for a reason. {Second Chapter up} Title will change if experiment goes well. -Still testing. No pairings.

AU! NOT another twin fic but this time Tsuna is a year older AND they have no Nana! *le gasp* How will Tsuna grow without having Nana to cower to I wonder? and who will be chosen as the heir for Vongola? this is my very first try so please and thank you! *will find better title to describe*

Stuck with having a baby as a father and being the opposite gender then I was in my past life, I found that this anime was underestimated and was most definitely not just made of hot guys who could kick ass. Self-insert fic. OC-centric. Eventual slash.

In a parallel world, Sawada Tsunayoshi lived by himself. Then, a small event changed it all. He received memories from his other self. His life spins into a different direction. Suddenly, meeting friends he's never seen before, a whole new trouble coming his way. What else would those memories cause? Slight AU, no pairings just family fluff

Some how I've ended up in a parallel world, in someone else's body with their memories, not to mention the fact that now I apparently I have the same class as the famous Dame-Tsuna. Yup, I've ended up in the KHR world, with no way of getting back. Well, looks like things are about to get interesting.

Byakuran asked Tsuna to go to a parallel world and make sure that it doesn't get destroyed. How will Tsuna do in a new world that is different then his own? With an older brother and a mean Nana on top of that? Also, he is now a new born baby. Just how will this end? Ooc, Oc's, female LOOKING and motherly ACTING Tsuna. DON'T OWN anything, only the idea.

What would you do if you were reborn as the fem version of your favorite anime character. Well meet Sawada Tsunami, the next Vongola Decima. GuardiansxFemTsuna

Tsuna was born as the older twin but was always sick. When her parents leave her at an orphanage, she trains herself to have them feel the same pain. The varia take her in and now they don't plan on giving her back. Fem27 bad at summeries

What if Tsuna wasn't the chosen Vongola heir but his twin was? What would become of him? Warnings inside and Rated for future language. Also, credit to 'The Liar Of Truth', who wrote "Sins of Thy Sons", for giving me the idea.

What would happen if Tsuna was actually a female, who wasn't as stupid as anyone realised. Well leave it up to fans imagination and this is one version you may find. OOC Tsuna and others. Please enjoy! Pairings: All x Fem27

In this story Tsuna grew up in the mafia, his parents weren't often around- to the point Tsuna almost didn't remember them- so instead, little Tsu was raised by his many different Mamas and Papas. This is a collection of his milestones and those who were there to witness them. First up...!(after prelude :p) Adventure cause what else is child-rearing?

In the Vongola household-more specifically in the Tenth Vongola household there are certain things that are absolutely sacrosanct. These matters are never out rightly discussed and never ever really verbalized unless one is a complete novice and needs a crash course or one is in a desperate situation that in a direct result of inadvertently breaking such inviolable rules.

Sawada Tsunako didn't want to believe her home tutor when he told her that she was part of the mafia... but here she is now, running around in her underwear, beating bullies while trying to survive his training and all the drama he has thrown her way. Female Tsuna, 18/27 and ?/27. Small hints of 80/59

In which Kuroko remained invisible throughout his middle school in Teikou, instead, he becomes a manager of Seirin's basketball club and hides his talent. Well, that is, until one by one, people find out and no one can resist such a rare gem, right? Right. Pairing undecided.