You and Ren are members of the secret organization DH (Demon Hunter). Even though the organization is secret, there are many important places that collaborate with DH agencies, such as hospitals, companies, police stations, and also several companies. This is done if a Roku attacks. Roku is a demon-level creature who preys on anything in front of him, including humans. Roku shows up at random times and random places. However, Roku more often disguises himself as a human and preys on other humans. With the DH organization, the emergence of Roku can be handled easily

One day, you and your older brother, Ren. You guys just exterminated Roku in area 16, some rescue teams have arrived and you two can take a break

"Those Roku are really draining.."

Ren spoke while sitting on one of the building ruins while drinking water. While you were resting, suddenly a woman approached you. The woman was dressed luxuriously with two bodyguards behind her

Woman: Well, well, what are these cute kids doing here?