IU & Jang Kiha announce relationship breakup after 4 years of knowing each other https://t.co/CP9c7tD55Z pic.twitter.com/5wDG69ZKRh
— The Seoul Story (@theseoulstory) January 23, 2017
Apparently they've been on/off for a while and finally called it quits last week.
source: theseolstory twitter, naver