The world always has those protagonist-like individuals—escaping from horror games, bearing the responsibility to save the world from monsters alongside their companions. Due to these reasons, they have no choice but to live in ordinary citizens’ homes, outwardly portraying themselves as typical high school students while secretly battling monsters and leveling up. And the ordinary citizens are ordinary but kind, always tolerant of the protagonist’s late returns, providing a gentle sanctuary. Jiang Yujin, however, is the antithesis of that ordinary citizen. Running a struggling business, living an unkempt life, the protagonist attends school by day, fights monsters after school, and even returns home to do his laundry and cook for Jiang Yujin. Yet even a laid-back person needs to turn things around. Despite financial deficits, Jiang Yujin briefly stands tall. While the protagonist battles monsters, he helps someone find their lost cat. While the protagonist tirelessly protects the school from monsters, Jiang Yujin is involved in romantic escapades with the Special Investigation Unit for Strange Species (?!). While the protagonist hunts for clues behind the scenes, Jiang Yujin, with a small skirt in hand, pretends to be a rich lady in an online romance scam. When the protagonist and allies face a major monster, Jiang Yujin… well, he stays up all night playing mahjong and ends up lying dead drunk at his doorstep. When the protagonist finds themselves in a precarious situation… The dead lying at the doorstep vanished. —— Beside the massive monster’s corpse, in front of the protagonist’s group, a man with snow-white hair blowing backward, holding a blade stained with threads of blood. Amidst the silence, Jiang Yujin, the ordinary citizen, lowers his eyes, bending slowly with the blade’s support: “Urgh—” Surely shouldn’t have had those two drinks after playing mahjong. Protagonist’s group: “…” — — Xu Tonggui, captain of the Special Investigation Unit, known as the living Yama in everyone’s eyes, a workaholic whose life revolves only around his job. Everyone thought he would remain a lifelong bachelor. Even the members of the Special Investigation Unit believed so. Until one day, they saw their captain pinning down someone whose hair was so disheveled it covered their face, gritting his teeth as he asked in a low voice, “Drinking again?” The hair covering half the face was lifted by a large palm, and the person pinned down on the car glanced sideways— That day, the members of the Special Investigation Unit understood two things: Never underestimate someone who seems unkempt. The captain has a damn good eye. — — #A chronicle of an unreliable adult suddenly becoming reliable, but not entirely# #Your guardian is still your guardian# #The man behind the high schooler saving the world#