Summoning Blues

Rin maybe should have paid attention in his summoning classes a bit more, especially when he starts calling demons to him through Mephisto's barrier. Mephisto, on the other hand, should have gotten Rin some better training because he's paying for it now.

And Yukio is going to start shooting on sight if he ever has to deal with something like this again.

As always, Amaimon is the only one having a good time.