Disclaimer: I don't own KuroBasu, KHR, HP or Naruto
- F!Harry is an unofficial apprentice of Jiraiya (only in the sense that Jiraiya made her into a Super Pervert (Female Edition), but she is still a romantic at heart)
- F!Harry took to writing Icha Icha in English and is a voice actor for the audio books the series spawned
- F!Harry is eccentric and calls Hermione and Luna her daughters (Hermione works as her PA and is largely exasperated by her best friend, Luna goes along with it enthusiastically)
- F!Kagami and Himuro are F!Harry's younger cousins; she has custody of them
- Kagami affectionately calls their guardian "Weirdo"
- F!Kuroko is Kagami's Troll of a bff
- She has conspired with F!Harry to get Kagami to relax via a lust spell, that partly worked as it was supposed to (Himuro interfered and the spell sent her to her perfect match, Xanxus (because I want to see it, damn it!)
- End result: Kagami has to go see a doctor a week after the Winter Cup
- How the Varia and Vongola in general come into the picture is up to the author
Jiraiya and Icha Icha by association are the only things from Naruto involved, or there can be small scenes where Jiraiya is visiting his apprentice with his other apprentice (either Minato or Naruto or even with the Ame Trio, take your pick).
As for HP, well F!Harry & co pop up every now and then, Harry to cause chaos in her wake and Hermione to do damage control with Luna mostly enabling Harry.
And damn but I can't decide on a name for F!Harry or F!Kuroko. For Harry one of my options is Jennifer but I don't think it really... fits, ya know?