@BaeSong2 is a staff at YG Entertainment. I honestly don’t know the context of their tweets but with all the “Ke ke ke ke ke” they were just joking around. Maybe Dara fulled a prank on her or something! ^_^
@BAESONG2: @krungy21 Dara unnie ~!!! You’re meanㅠㅠ
DARA: @BaeSong2 Followed!!!ㅋㅋㅋㅋㅋㅋㅋㅋㅋAh seriously the people on our team are such charactersㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋIt’s fun
@BAESONG2: @krungy21ㅋㅋㅋㅋㅋㅠㅠ While I was feeling hurt and sad and disliking you..ㅋㅋㅋㅋㅋㅋI almost stopped trusting in you..ㅎㅎㅎ It’s a relief we have a happy ending like thisㅠㅋㅋㅋ^^
Source: @BaeSong2 and @krungy21
Translated by: @kristinekwak
oh-dara.com 
Comments on: "Twitter: BaeSong2 to Dara – “Dara unnie ~!!! You’re meanㅠㅠ”" (4)
pulled a prank* ~
maybe dara didn’t notice or forgot to follow her back or sum’n.. and she was teasing dara bout it… sometimes i forget she’s an unnie coz she’s such a jolly and young character… but i really like seeing her caring unnie/noona side… i think it’s a glimpse on how she really is with her fam.. she’s the eldest after all… cute dara-unnie b^.^d
Its not Dara who is mean it’s baesong, so what baesong we dnt care 4u.
Maybe because she didn’t followed her back on twitter right away? Lol
I think Baesong was refering to dara’s tweet before in which she thought Dara was being mean. Maybe it was when Dara told Bom and Minzy to dont look at each other during singing on stage.