A guy is waiting to meet up with some people he met online on "bixi"--where he draws an amateur web manga--but one after the other, they all cancel at the last minute. The only one who shows up in the end is a girl called Mina. After dinner and a short train ride, she suddenly confesses to him, and they both end up in his home. A bit forward, but surely nothing bad can come from this, right?
There's a lost-in-translation pun in the title: "mina" means "everyone," so you're led to believe there's going to be an offline-meeting with several people--which the protagonist probably though as well--but Mina is in fact someone's name.
DF | RG | FU

A perfectly normal message from a girl you just met earlier today