Jouno was turned into a vampire after a battle with their traitorous commander, Fukuchi. They do not remember Tecchou and serve Fukuchi’s orders without question. Jouno was assigned to kill Tecchou and here they were their reunion in the midst of the battle field. Tecchou searched for Jouno only to find him like this a entirely different being. The only way to snap Jono out of it would be for Jouno to remember and break free himself.