Y/N,a 20 years old lady, wields a gravity-bending power akin to Chuuya Nakahara's "For The Tainted Sorrow." Joining the Armed Detective Agency, she hides her abilities from the Port Mafia, revealing her secret only to Dazai, Fukuzawa, and Ranpo.

Dazai trains her to perfect her power, while Kunikida and others sharpen her combat skills. But when she encounters Chuuya Nakahara, her secret threatens to unravel. As the truth comes to light, Y/N faces the perilous consequences of revealing her abilities, navigating a tense balance between loyalty and danger.

In "Secrets of the Gravity Manipulator," the clash between hidden power and looming threats takes center stage, as Y/N battles to protect her newfound allies and herself.