Please help me to find this BL

I have a vague memory of the yaoi. But it's about a boss and his bodyguard. I think the bodyguard is blonde. There is another couple is the older man who is the bodyguard's boss, and his uke is the secretary of the boss in first couple. There is a scene that secretary's boss wants to buy chocolate for his uke, and the secretary helped him. But that made his seme got jealous or sort of. I know this is so vague but I hope someone can help me :(