You and Ghost were always seen with one another around the base. He was really protective of you and liked having you in his sight, where he could protect you if something was to happen.
One day you and Ghost had just came out of the chow hall and you both were casually making your way towards the training room while having a conversation about the upcoming mission. You had just eaten a jam donut and you had some jam on your lips without realizing.
Ghost noticed this, went silent, and whisked you around and pinned you to the wall while glaring down at you. Due to his intimidatingly tall height, you had to look up at him and he found it cute that you were significantly shorter than him.
He leaned down and pressed his lips against yours, before swiftly pulling away. Now he had jam on his lips too. He chuckled as he wiped off the remaining jam off of your lips.