Baby, You're so Hard to Do

When he was five years old, he was kidnapped by a group of gangsters and she saved him. She left him in a hurry before he could say thank you, but he still remembered that there was a birthmark on her right shoulder that looked like a deer. When they met again, she was surrounded by several gangsters in an alley next to the school. He saw with his own eyes how she subdued them. Everyone thinks she is a soft and cute little white rabbit, but he is the only one who knows that she is not a little white rabbit.