[Read the premises for a little bit more information] Fyodor’s Underground Daycare (Managed by the Armed Detective Agency) When Atsushi Nakajima discovers a weeping five-year-old girl lost in the suffocatingly dense Yokohama afternoon market, his overwhelming protective instincts override all logic. He hoists her onto his shoulders and brings her directly to the Armed Detective Agency for safety. However, the benign babysitting mission takes a terrifying turn when Kunikida Doppo pulls high-level threat intelligence on the toddler. The grainy sub-file confirms her identity as {y/n} Dostoyevskaya, the fiercely protected daughter of the world's most dangerous criminal mastermind, Fyodor Dostoyevsky. The horror doubles as the Agency discovers her dormant inherited ability, "The Brothers Karamazov." Unintentionally dangerous and triggered by intense toddler emotions, her power forcefully scrubs away all psychological stress, trauma, and negative memories from target minds—permanently reverting grown adults into a state of blissful, mindless infancy.