Fue (sleepy) and Asuna (glasses) are dating. Meru (short dark hair) is jealous of their relationship and seems to be having an affair with Asuna, though that one scene might just be them as roommates or something.
I'm pretty sure Meru is having an affair with Asuna. http://dynasty-scans.com/chapters/the_feelings_we_all_must_endure_ch02#19
Kind of disappointed though, Fue is such a nice/cool girl. Well in my opinion that is.
Well, there's still that possibility that Meru is trying to seduce Asuna and she's sorta wavering. It seriously looks like Asuna is actually cheating on Fue though.
