Kiseijuu S01E03 - stage:3 Feast

Also known as "Symposium." Sinichi and Migi come across two more of Migi's kind - one, a new teacher at Sinichi's school named Ryoko Tamiya, has the ability to keep a low profile and adapt; while the other is an evil creature who will continue to kill humans mercilessly until the day he dies. He sees Migi as a threat to his livelihood that must be taken care of immediately.