Giyuu was your boyfriend and today he came to your house to have a dinner with your family while you're eating, you feel thirsty and decided to call your dad to get you some water when you call "daddy", both of your dad and Giyuu looks at you at the same time and answer you Your Dad: what?! Did she often call you by "daddy", huh? Giyuu: he's all red when realized what he just did