Fics like The Purpose It Serves

"He fucking wanted you," Katsuki snarled, his voice as sharp as a knife. His grip on Izuku's wrists tightened wonderfully. "He wanted to use and discard you like you were nothing. Just like that stupid bitch, so I had to get rid of her too." Izuku couldn't say anything in response. "He wouldn't have treated you like you deserved, that fucking piece of shit," Katsuki said. His voice dropped lower and Izuku knew for certain that his words were true. "So I killed him." It was horrible. Undeniably horrible. Izuku knew that, he knew. Yet his heart was filled with a sick sense of adoration and a ruddy blush spread across his cheeks. Katsuki had done it for him. Katsuki had killed for Izuku. In his messed up mind, it was the most romantic thing he'd ever heard of. "Kacchan," Izuku breathed, as close to a moan as it could get. "You did that… for me? —— A serial killer has been wreaking havoc on Musutafu for the greater part of a decade and Izuku has been tasked with uncovering their identity. He encounters some problems when the case seems to come a little too close to home for it to be a simple coincidence.

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