He clenched his fists. Red eyes becoming glazed. "Why'd it have to be you of all people." He growled. "Not you, Deku." His voice cracked slightly. I quickly looked down. I didn't want to see his expression. It'd probably hurt me too much. "Please... Not you," Unlike his usual voice that was filled with annoyance and aggressiveness, he sounded distressed. I stole a glance at him. I watched as tears had spilled down from his eyes. Kacchan never cries. Ever. ... No Quirks AU

Katsuki decided to become the number one hero, even deciding to outrank the symbol of peace, to become the one Izuku admires again, like when they were children. Coming to the realization of his true feelings for Izuku, he begins to bully him mercilessly to cover them up and try to deny them. Things become a bit messy when Katsuki gets in the way of a ray from a man who's quirk is to make his target only able to tell the truth for 72 hours. [Warning: there is some swearing in this! I typically don't like writing swears but for the sake of honoring Katsuki's character, there is some. Please do not read if this bothers you! Though, I assume if you watch or read BNHA, you're probably used to it.]