Preface: Why?

Rika was a young, tiny, optimistic, sarcastic girl who can make anyone smile. Meeting Alfonso, a rude, big, violent guy, she challenged herself to make Alfonso smile and cool down at the same time. As they grew closer to each other, Rika felt a little attractive to Alfonso... She felt as if, the more she tried to cool Alfonso down, the she made him smile, the she gave him an Iris... the more she gave a piece of her heart to him... But could anti-social dark Alfonso feel the same?