It happened during one of Keigo’s late-night visits. He’d sprawled on your couch after patrol, sleeves rolled up, rambling lazily about how exhausted he was. You were half-listening, half-watching the way his muscles shifted whenever he flexed his arm to emphasize something.

You leaned forward without warning and bit his bicep—quick but firm.

Keigo jerked upright. “Ow—?! Did you just—?!” His golden eyes widened in disbelief.

You pulled back with a grin. “Yep.”

He blinked at you, then huffed a laugh, shaking his head. “Unbelievable. I fight villains for years, survive a war, lose my wings… and this is how I go out? Attacked in my own girlfriend’s living room?”

You laughed harder, clutching a pillow. “Don’t be so dramatic, it wasn’t even that hard.”

He sat up straighter, narrowing his eyes, and leaned close until his face was inches from yours. “You’ve unleashed something dangerous, y’know. Hawks never lets an attack go unanswered.”

Before you could react, he scooped you up, tossed you onto the couch cushions, and pinned your wrists with ease. His grin was mischievous as he lowered his head.

“Guess it’s my turn,” he murmured before playfully biting your shoulder—gentle enough to make you squeal but firm enough to prove his point.

“Keigo!” you laughed, squirming under him.

He pulled back, smug. “Mm. Sweet revenge.” Then, softer, he pressed a kiss where he’d bitten you. “Don’t go thinking you’re the only one who gets to leave marks, love.”