Does anyone know this ringtone music?

Animeholic101 Asked: Does anyone know this ringtone music?

I don't the name, but I know iv herd it b4. It's Donghae's ringtone in the Korean drama Smile, Donghae. I don't know if he had other ringtones, but it's the one when Donghae finds out that Dojin schemed to take over the hotel.