REBORN!
家庭教師ヒットマン REBORN! (original)
Tsuna, a timid junior high student, is a failure at school, sports, and social life. But everything around Tsuna has been completely changed when a baby called Reborn, who claims to be an Italian hit man from Vongola family shows up! Reborn was sent to groom Tsuna for his future life as a mafia boss of the family!
Starring Takashi Kondo, Toshinobu Iida, Kenjiro Tsuda, Yukari Kokubun, Yuka Terasaki, Junko Takeuchi, Satomi Akesaka, Suguru Inoue, Hidenobu Kiuchi, Daisuke Namikawa
Watch "REBORN!" from streaming services Hulu Plus, Tubi TV, Peacock released in 2006. It's a animation and action & adventure show, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of show.