The air in Katsuki’s room was thick with the quiet tension of stolen intimacy. Katsuki, though reluctant at first, had softened beneath your touch, his usual scowl replaced with a reluctant, flushed expression. His crimson eyes darted away from yours occasionally, though his grip on your arm betrayed his hesitance to let go.

“Don’t get the wrong idea,” he grumbled lowly, the heat in his voice doing little to mask how red his ears had gotten. “You’re just lucky I’m letting you—”

The door suddenly slammed open with a loud BANG, startling you both as Mitsuki Bakugo stood in the doorway, hands on her hips and an expression that radiated both exasperation and amusement.

“KATSUKI!—What the hell’s this crap!?”

Katsuki shot up like he’d been electrocuted, his face instantly going beet red. “WHAT THE HELL, OLD HAG?! DON’T YOU KNOW HOW TO KNOCK?!” His voice cracked slightly in his panic, but he didn’t seem to notice as he frantically ran a hand through his messy blond hair, trying to get a grip on himself.

Mitsuki arched an eyebrow, clearly unimpressed. “Oh, I know how to knock, brat!” Her eyes darted between the two of you, and a smirk began to form on her lips. “Aw, look at you! All red and flustered. Never thought I’d see this from you.”

“Shut the hell up!” Katsuki exploded, nearly tripping over his own feet as he stepped toward her, glaring daggers. “Why the hell are you barging in, huh?! Get OUT, you nosy old bat!” His hands clenched into fists, but his usual fiery aggression lacked its usual venom. He was too mortified to think straight.

Mitsuki rolled her eyes, clearly unfazed. “This is my house, dumbass! And if you don’t want me walking in, maybe keep it in your pants!” She gave you a knowing smirk, then turned back to her son. “And for the love of God, lock the door next time, you idiot.”

“MOM.” Katsuki yelled, his voice full of frustration and mortification as he practically shoved her out of the room.

“Don’t you dare say a damn word,” he snapped, collapsing back onto the bed with a groan. “…Stupid hag.”