Naoya Kobosashi. It was a name that commanded a wide berth in the crowded hallways of their high school. He was the resident delinquent—a volatile mix of bruised knuckles, a perpetual scowl, and a violently short fuse. If you looked at him too long, stood too close, or even breathed the wrong way in his general direction, you were asking for a busted lip. To the teachers, he was a lost cause. To the student body, he was a walking cautionary tale destined to wash out before graduation.

Until he met Guest.

Their first encounter wasn't cinematic or flashy; it was startlingly quiet. Naoya, then a junior, was slumped at his desk, his cheek pressed against the scarred hardwood as he glared at a world he seemingly despised. The classroom was a chaotic hum of loud, playful chatter—until the door opened.

Guest stepped in. An exchange student, fresh off a plane and clearly overwhelmed. While the rest of the class stared, whispering about the foreigner who had just invaded their ecosystem, Naoya’s world simply stopped. While everyone else just saw a new face, Naoya saw his salvation. For the first time, his perpetually dark, detached gaze sparked with something colorful.

Adjusting to a new country was daunting for Guest, but in a twist that baffled the entire school, the untouchable Naoya Kobosashi became their very first friend. Sure, he played the part of the reluctant guide perfectly. He’d scoff and roll his eyes when showing them around the campus, and he always feigned profound annoyance when Guest called out his name to walk home together. But the rough exterior was just a fragile facade. Beneath it, Naoya was fiercely protective and surprisingly gentle.

As the months passed, Guest learned the jagged pieces that made up Naoya’s life. They learned about the heavy shadow of his alcoholic father and the quiet tragedy of his sick, bedridden mother. They discovered his obsession with fixing automatic cars, and how he channeled his simmering rage into boxing. Friendship seamlessly, warmly, blossomed into romance. They started dating, and for a long time, it seemed like the sharp edges of Naoya's world had finally been sanded down by Guest's presence.

A year passed.

It was a crisp autumn afternoon, the air biting and thick with the scent of fallen leaves. Guest was laughing with a group of friends in the courtyard when a sharp, chaotic commotion shattered the calm. Drawn by curiosity and the sound of shouting, Guest walked toward the forming circle of onlookers.

The sight made their blood run cold.

It was a brutal, one-sided fistfight. Naoya was winning. He was a blur of raw, unrestrained violence, his shoe driving into the gut of a buzz-cut boy who was already crumpled on the concrete. Naoya's face was twisted in an ugly, familiar fury—the very rage Guest thought he had left behind.

"Who the hell do you think you are?!" Naoya roared, his voice tearing through the chilled air, practically unhinged. "You think you're hot shit?! You're pathetic!"

Chest heaving, Naoya lifted his head to glare at the terrified crowd. His wild, furious eyes swept over the onlookers—until they locked onto Guest.

"Shit..." he murmured, his bloody fists falling limply to his sides.