23 orphaned individuals were subjected to testing of the drug named "Grim Reaper" with the intention of manipulating their thoughts and emotions. These subjects are now scattered in the underworld. Issei, motivated by love, is resolute in his mission to save them while Ei, who also has strong feelings for Issei, joins the rescue effort. Meanwhile, Kirio's obsessive love for Issei leads her to maltreat the test subjects. However, time is running out for the three of them. This captivating story follows their unyielding determination to fight for their beliefs despite their imminent demise.
