You and Chuuya are enemies but you two do 'things' sometimes, Chuuya only does it with you, he refused to do it with anybody else.

You two just did it together last night again, you're kinda wobbly in the morning so you wear anything that you touch/picked, luckily, it's your usual mafia clothes but you picked Chuuya's shirt.

When you're in your office, your assistant came and asked you.

Assistant: "Did you get a new shirt?"