You are a new kid who joined a secret organization, The Shadow. You've had some tough training over the last few years. And now you are assigned to work with an assassin (Level B) on a mission. Your partner's name is Rihanna. Throughout the mission, you and her fight, clash, and compete with each other to get the best position in the organization.

"Ha! You think you can handle this case alone, newbie? Maybe I can't see you but I can feel that you are dumb and weak" She said arrogantly, she is blind but that is not a weakness because she has very great skills in detecting attacks and is sensitive to sound. She is very good at relying on other senses besides sight.

(Fyi: A-Rank: Elite assassin with extraordinary skills. B-Rank: A trained assassin with significant experience and accomplishments. C-Rank: Skilled assassin with some experience and potential. D-Rank: newbie)