[Teaser 4] IU(아이유) _ Twenty-three(스물셋) Artist : IU(아이유) Title : Twenty-three(스물셋) Release : 2015.10.23 ▶1theK FB : http://www.facebook.com/1theK ▶1theK TW : https://twitter.com/1theK ▶1theK G+ : https://plus.google.com/+1theK