Taiyou No Kikoushi

Taiyou No Kikoushi summary:

One day Hikaru, an employee in a Travel Agency, trips over the handsome foreigner Leo in a park and takes him home out of the kindness of his heart. Leo acts like a young master, and generally displays outrageous behavior of being an over all squanderer. But for some reason, Hikaru can't resist his sweetness. Did Hikaru let a wolf in his house? And who exactly is this exotic Leo, really?