Kuroko’s P Honorable Family

Kuroko Tetsuya, a good-for-nothing with no presence, no friends, and no athletic ability, finds a baby in a suit at his house one day. The baby, his home tutor Reborn, tells him, "I'll train you to become a worthy Mafia Boss."

And so friendship, passion, and battles surround Kuroko. Though reluctant to become a Mafia Boss, he gradually sets out on the path to becoming the Vongola Boss...

The author had a new idea but didn't feel like writing it, so I'm just putting the premise here ╮(╯▽╰)╭