@kazuki_screw:  With aniki (Aoi) at our usual place (^3^)

 On the bottle it says: Aoi-san's and Kazuki's sake/alcohol. 

I think it's safe to say they were not sober at the time (or at least Kazuki if his writing is anything to go by) xD. And another prof of their intoxication is that they called Mizuki and probably woke the poor thing up, since he did wrote good night before. 

@mizuki_sadie: Got a call from that gentleman Star&Kazuki.. I seriously wanted to join... オフで都内くると誓った夏のおわり。。。。*


And it has nothing to do with the date from above but here's Byou's tweet just because I find it sweet. 

@screw_byo: Had very good time with Mao-aniki this time as well .... Opposite to Mi-ku I'll go to Osaka when I'm free and  誓った夏のおわり *  

TN: *I didn't know who to translate the last part, the first part would be "when I'm free I'll come to the capital/metropolitan area and" 誓った夏のおわり - here it's when it got complicated since I don't know if this is a phrase (I saw it on the end of Byou's tweet as well) or something else. It would be translated into pledge for/to summer end.