iD_ᴇNTITY or Yureka (유레카) is a Korean style manhwa series created by Son Hee-joon in collaboration with Kim Youn-kyung and distributed by Tokyopop in North America. The series centers on the main character Jang-Gun and his friends along with their virtual reality avatars in the computer game world called "Lost Saga". There are 36 volumes right now, twelve of them have been released in the United States and 34 in France.