Akutagawa breaks into Atsushi's apartment, out of pure boredom. What he walks in on is not how he expects Atsushi to be spending his tuesday evening. originally posted on ao3!! (elliotoxoxo) - it is my work though

Captured, bound, and betrayed by someone he trusted, Dazai Osamu finds himself at the mercy of two enigmatic tormentors who are determined to break him: body, mind, and soul. With no allies in sight and his carefully laid plans crumbled to dust, Dazai faces a darkness deeper than he's ever known. As pain numbs his senses and despair claws at his mind, one name keeps him tethered to hope: Chuuya. But with time running out and his captors growing crueler by the day, will Dazai be saved, or will he succumb to the void within? . . . Disclaimer: I do not own the characters apart from Seraph and Cipher, nor do I own any artworks. The plot, however, is mine.