It was just after sundown, the day just before the Titan's would attack Wall Rose, immediately after the graduation ceremony. Jean Kirschstein was walking back to the barracks, and despite his number six ranking and sure-fire plans to join the Military Police, something was eating away at him. That suicidal idiot Jaeger finished one spot ahead of him, and was joining the Scouting Legion, and that pissed Jean off to no end. His thoughts were distracting him, and he didn't see the focus of his thoughts, Eren Jaeger, coming towards him. Evidently, Eren's mind was just as focused, as the two future soldiers collided head-on with each other.
The two stumbled backwards once this happened, and after taking a second to rub their heads and gather themselves, in almost comically identical fashion, they looked up at the other. Both faces instantly flashed anger as they advanced towards each other, getting right in each other's faces.
"Watch where you're going, Jaeger!" Jean glared, his voice raised just a little bit, his eyes glaring right into Eren's bright green ones.
"No, you watch where you're going, horse face!" Eren replied, his glare even more intense than Jean's. "Now get out of my way, I need to go meet Armin and Mikasa." He made to push past Jean, but was pulled right back. Those words, mostly Mikasa's name, had hit a nerve. Jean pulled the green-eyed soldier back, grabbing him by the collar of his military coat and pulling him into a dark alley between two buildings in the camp, then pushing him up to the wall. The closeness of their bodies (Jean was pressed fairly close up against the other man), did not go unnoticed to Eren, who squirmed just a bit. His complaint was cut off by Jean speaking.
"You are such an annoying, suicidal idiot! Not only are you willingly going to fight Titans, you're dragging your friends with you! You have the option, you know, to survive, to go to the Military Police!" He was almost desperately angry now, and Eren could see it. That didn't mean that his temper didn't flair at these cowardly words.
"Because I'm not a coward like you! I actually want to fight the Titans, kill them all! You have no idea what they're like!" Jean had to resist the urge to punch him after that was said. No, he didn't have much experience at all with Titans, but he also wanted to keep it that way.
"I want to stay alive, and the best way to do that is to avoid fighting Titans and join the Military Police, and that's what I'm doing! There's a huge difference between being brave and being stupid, and you've crossed that line so many times during our training! You'll be dead within a week of joining the Scouts." Jean was now aware of the squirming that Eren was doing, and while he didn't back off at all, there was a very light pink tint across his cheeks.
"I will not die, not from one of those stupid Titans! I'll kill them all, you'll see, I'll show you!" Something snapped in Jean when Eren said that, and before he could stop himself, he had leaned in, connecting their lips in a brief, one-sided kiss. The only reason Eren didn't shove the other away was because of how close their bodies had been for the moments leading up to this point. Once the kiss was broken, the two looked at each other, almost glaring. They were breathing a bit a heavily, and both men's cheek were a light red.
"You're such an idiot…" Eren said before reaching forward and grabbing Jean by the back of his head, hands in his hair, and pulling him in again in an aggressive, rough kiss. The two fought for dominance during this, not only with their lips, but with their tongues, and even with their bodies. They repeatedly pushed each other, against the opposing walls of the alley. After a few minutes of going back and forth like this, Jean eventually took full control of the kiss, his hands pushing Eren's away from him and up against the wall.
Eren struggled for a moment, and tried to get his wrists free. Jean moved his lips down to the other's neck, lightly kissing before giving a small bite. Eren then proceeded to explode into his Titan form, crushing Jean and the two military barracks they were between. The end.