Reborn
She was his Madonna, his main woman, his love, his future wife.
Yes, he had a few others on the side but they were strictly business relationships and she knew that.
Hell even she had a few of her own, but he knew her heart belonged to him just as his did to her.
They were both the best of the best in the Mafia world and would do anything to keep their family safe.
Hence why he was in Japan and she in Italy, she had stayed behind to protect the ninth while he trained and protected the tenth, Tsuna, which was another reason he was pushing him so hard.
The faster he became the tenth the faster he could get back to his Madonna, his love, his future wife, his Kagome.