They were involved in a dating rumor back in 2018, after the release of movie 'The Negotiation', however they denied the rumor.
https://www.dispatch.co.kr/2122187
-This is not true. Hyunbin is mine.
-We were just pretending like we didn't know this... Dispatch is so thoughtlessㅋㅋㅋ
-It feels like I'm eating left-over from last night...ㅋㅋㅋ
-Not even surprised... I hope things will go well for both of them
-What the heck are you doing Dispatch? Didn't we all tell you to pretend like you don't know about them? We want to see them star in a romance movie or drama for one more time...
-Dispatch is such a party-pooper. We all knew it, but we just pretended like we didn't
-As much as I love this couple, they should've let the artists to decide when to reveal their relationship. We want to see them in another romance movie or drama for once more...
-Can't you just leave them be?
-We all knew that they're dating, and we also knew that they didn't want their relationship to be publicized... Dispatch is a freaking trash for revealing this
-For how much longer is Dispatch going to do this?
-We may not know the truth, but they really look cute togetherㅠㅠ
-I thought we were pretending to not know they're in a relationship???
-They look so cute togetherㅠㅠ I ship this couple...
