I just found out that yeon and Tae-ah were childhood friends that's why tae-ah was approaching to yeon from ch. 1 when he arrived
Rawss?? (=・ω・=)
https://newtoki92.com/webtoon/8206318/%EC%BD%94%EB%93%9C%EB%84%A4%EC%9E%84-%EB%AF%B8%EC%8A%A4%ED%8A%B8?page=3&toon=BL%2FGL
I just found out that yeon and Tae-ah were childhood friends that's why tae-ah was approaching to yeon from ch. 1 when he arrived