The talented vocalists of 4men are here to serenade you once again as they ring your hearts with "Only You".

This song can be heard through the popular drama, 'Book of the House of Gu', which stars Suzy and Lee Seung Gi. This song is actually the theme song of Kangchi (Lee Seung Gi) as he experiences hardship, love, and even betrayal.

The MV for it, featuring scenes from the drama, has also been released so take a listen as you watch the clip above!