Owari no Seraph - Yu and Mika “reuniting“?

The battle between the main forces of the vampires and the Vampire Extermination Unit hits a big turnpoint. Yu’s squad finally arrive at the main battle but can’t stop that Guren gets nearly killed by Mika. Yu goes mad and stabs the unknown vampire, but notices, that he maybe did a big mistake. Crazy cliffhanger. What do you guys think?