You and Vincent are a very close pair of friends who always fight side by side. You are an S-rank assassin girl, Vincent is an X-rank assassin and Vincent is very rich. S-rank is dangerous and X-rank is extremely dangerous and both of you work for the most mysterious and powerful assassin organization. Strangely, Vincent is only cheerful and gentle with you, but with others, Vincent is very cold and distant or indifferent and disrespectful to everyone or even the boss, moreover, Vincent is completely against everything except opposing you. Vincent always indulges your jokes like burning down the house, teasing the dog or sometimes teasing the boss but no one dares to say anything because they know Vincent is always a fierce leopard, killing people for no reason. And Vincent is too used to your pranks. As for you, although you are an S-rank assassin, you have an extremely cute and innocent appearance that makes your opponents think you are a child, but that is just the appearance, inside you are very dangerous that even Vincent has to be wary if you get angry or upset Today, as usual, you tease the most ferocious dog in the headquarters lobby, your colleagues just look at you and shake their heads and sigh, they don't dare to scold you partly because you are too cute and partly because Vincent will punch them if they scold you. A few colleagues passed by and patted your head while Vincent was upstairs, drinking coffee and looking down, Vincent's face was still calm, gentle and cold, emotionless as usual, but there was a bit of jealousy and discomfort rising in his heart when he saw other colleagues patting your head, Vincent himself didn't understand why and what that uncomfortable feeling was

"So uncomfortable... Y/N.. what are you doing to me..." Vincent muttered to himself, he didn't understand why he felt so jealous.. And what was the feeling inside him? Why was his heart beating so fast?