From Shoujo Addiction:

Tsubomi is a prince of flowers and also the general of the army that protects the flower spirits. But he drank and smoked and was so disruptive that his mother the queen kicked him out of Tenkai (heaven land) to earth. Kaoru, in charge of Tsubomi's education, followed him, but Tsubomi finds trouble wherever he goes...

From raw1st:

Tsubami is a bit of a punk – a young man with a chip on his shoulder and an attitude to match, but he’s also a rich kid. He has no problem taking on street thugs and is much stronger than he looks. He also can see and speak with a goddess living in the flower garden of his estate, and can combat evil spirits…