- Volume Not AvailableChapter 1-57
- Ch 57 Jan 9, 2018 Ch 56 Jan 1, 2018 Ch 55 Dec 25, 2017 Ch 35 Jun 14, 2017 Ch 34 Jun 14, 2017 Ch 33 Mar 23, 2017 Ch 32 Mar 23, 2017 Ch 31 Mar 23, 2017 Ch 30 Mar 23, 2017 Ch 29 Mar 23, 2017 Ch 28 Mar 23, 2017 Ch 27 Mar 23, 2017 Ch 26 Mar 23, 2017 Ch 25 Mar 23, 2017 Ch 24 Mar 23, 2017 Ch 23 Mar 23, 2017 Ch 22 Mar 23, 2017 Ch 21 Feb 20, 2017 Ch 20 Feb 13, 2017 Ch 19 Feb 6, 2017 Ch 18 Jan 30, 2017 Ch 17 Jan 23, 2017 Ch 16 Jan 16, 2017 Ch 15 Mar 23, 2017 Ch 14 Mar 23, 2017 Ch 13 Mar 23, 2017 Ch 12 Mar 23, 2017 Ch 11 Mar 23, 2017 Ch 10 Mar 23, 2017 Ch 9 Mar 23, 2017 Ch 8 Mar 23, 2017 Ch 7 Mar 23, 2017 Ch 6 Mar 23, 2017 Ch 5 Mar 23, 2017 Ch 4 Mar 23, 2017 Ch 3 Reversi (Eun Song) 0... Mar 23, 2017 Ch 2 Reversi (Eun Song) 0... Mar 23, 2017 Ch 1 Reversi (Eun Song) 0... Mar 23, 2017
In the summer of 2016, an unknown alien organism invades Earth and annihilates 20% of the human race in a span of one month . However, survivors of this virus were either transformed into a hideous creatures called "Worms" or into super-humans called the "Heteros". The heteros form a protection agency called the "ISO" to fight the worms. Haru, a young hetero but also a mischievous trouble maker, wants to join this agency in the fight. But it's no easy road.