Cynthia the mission manga

Cynthia the Mission summary:

Cynthia comes from a family of assassins. She acts as a part-time student who's BALD (she only appears that way), and she continously receives orders from the organization to assassinate people. The story opens with her and 2 friends going shopping for hair growth solution, when a new mission comes up. Her master, who taught her everything she knew 3 years back, was hired as the target's bodyguard. The two must fight, but what will the outcome be? Read on!