Seolhyun began to date Yook Sungjae in early 2015. However, Zico loved Seolhyun and has expressed his love actively. Eventually, Seolhyun has broken up with Yook Sungjae last March and became Zico's girlfriend.
1. At his concerts held last year, Yook Sungjae said again and again on the stage, "Don't I look like a prince?" The lyrics of Seolhyun's part of "Heart Attack" is, "Oh my prince."
2. At the ending of 2015 KBS song festival, kpop singers such as Ailee, BTS and VIXX tried to let Seolhyun and Yook Sungjae be close to each other.
3. When Zico appeared in "Radio Star" last January, he said, "I have an unrequited love for a female celebrity and I have been dumped twice. But I'm not gonna stop loving her." Yeah, it is Seolhyun.
4. Zico has recently written many songs about an unrequited love. A notable example is Block B's "Toy."
6. In the music video of Zico's "I am you, You are me," you can see the time changes.
Yook Sungjae's birthday is May 2 and Seolhyun's birthday is January 3, while Zico sings, "I'll treat you nicely so that your obsessive ex-boyfriend will be out of your hair."
Well, what do you think? Do you think it's reliable? :)