The Grim Tycoon's Soft Little Sweetheart Is Too Adorable!

【This is an angst novel! The sweeter the beginning, the more heartbreaking the ending! Read with caution!】 He used to be a thug who smoked while cornering people in an alley. Then he met her, and started noticing the little dresses in shop windows. How could a cute girl and a bastard of a man not be happy together? But at the end of the story, all that remained was you sleeping forever, while I thought of you always...