Lee Joo-yeon, who has since gone on to become an actress, initially graduated from the girl group After school.The two attracted the attention of the K-poppers when a video showing them doing Aygeo (a 'cutesie' display of affection often involving baby voices) appeared on the web.
The BIG BANG leader did not actually mentioned any names but the questions of the emcees imply that they were referring to the two Japanese models.
G-Dragon also seems to know who they were talking about too, without names being mentioned, so he just responded accordingly.
The news that Kwon Ji-young, well-known in the world by his stage name G-Dragon, and Lee Joo-yeon, a former member of the girl group After School are dating; news of the couple appeared as a New Year gift for K-pop fans.
According to Dispatch, the two South Korean celebrities spent four days and three nights on Jeju island for a vacation together.
— Young Hee 🐝 ||¦||¦¦ (@Rsconic_) January 1, 2018 Responding to that publications, G-Dragon’s agency YG Entertaiment then stated that "the two are just colleagues.