Just last week, we reported that a song by male duo December would be taking part in the IRIS OST with their song Love is so..., from their recently released album. The MV for the track was finally released today! This is now IRIS' third drama soundtrack MV, as they have previously released MVs for Baek Ji Young's Do Not Forget, Shin Seung Hoon's Love of IRIS, and Big Bang's Hallelujah. The MV reveals a love rectangle of Lee Byung Hun, Jung Joon Ho, Kim Tae Hee and Kim So Yeon and also reveals some scenes that has not been aired yet to add in more excitement. The question that remains - Who will Lee Byung Hun end up with? Kim Tae Hee? Kim So Yeon? The storyline is getting more and more interesting with each episode! Check it out below! Love is so... MV: Cr: seaHEARTsso I personally think the track has a sad, beautiful ballad-based atmosphere that goes along perfectly with the romantic, action drama. What do you think?