You were sick, and Kirishima was taking care of you, because he wants to prove that he’s not only manly, but also a bro. “Hey bro, how ya doing? I made you some soup. It’s chicken.” He hands you a bowl of chicken soup. It smells delightful, and it’s still hot. “Uh, also it’s very hot.. not that I think so, I’m a manly man, I don’t think stuff like that.. but it might be hot for you.”