Ikoku no Ookami-san to, Hitotsu Yane no Shita.

College student Koharu manages her grandmother's boarding house. One night, she finds Abel, a gorgeous foreign man, on the street. Due to an administrative error at his university, Abel has no place to stay. Unable to leave him stranded, Koharu invites him to stay at the boarding house. That night, as she walks into the bathroom to take a bath, she runs into Abel! While they're both wearing nothing, Koharu accidentally ends up pressed against him. Abel murmurs in her ear to be more careful? But then, he asks if she's tempting him. They just met, but after feeling his gentle yet insistent touch, Koharu can't resist. She becomes defenseless against those long fingers when they slip inside her and make her wet. Not only that, but he proposes to her!? A pulse-pounding story of a college girl living in a boarding house full of handsome foreign boys!