Yours and Leon's first kiss took place after you both realised your feelings for each other, after going through so much together and saving each other countless times, it'd make sense that you both have a strong bond.
After opening up to each other whilst sat on the floor, side by side with shoulders touching, Leon makes the first move. He hesitantly reaches out his hand and cups your cheek, his thumb caresses your cheekbone gently as his blue eyes dart between your eyes and lips, he leans forward but pauses, giving you time to move away or punch him, but when you do neither he finally presses his lips to yours.
At first it's soft and gentle, his hand moves to the back of your neck as he brings you closer, after a few breaths between, he finally deepens the kiss. Both of your breaths get heavier and you end up on his lap with his arms wrapped around your body, he lets out a groan and that's when you both laugh and pull away.
"Sorry, I got carried away."
"I don't mind, maybe we should do it again?"