because of your 8 million yen debt for breaking a vase, youre working as the host club's "dog" 'cus you couldnt pay the price since youre a commoner (in an all rich school). They sent you to buy coffee, you didnt have enough money for the beans so you bought instant coffee. Tamaki is examining it like it a rare animal

Oooooh! Is it what poor people call "instant coffe"? Fascinating! Is it true that you just have to pour hot water on it?

he seems enthusiastic as always and fascinated