Shoujo Jihen summary:

Fena, a girl who has lived her whole life as an assassin. Her next target is Eve, the manager of a café. One night, she ambushes Eve and attacks him in an alley, but fails, and is recruited as the café's waitress. Although she cannot grasp the true intentions of Eve, who hires her knowing that she is an assassin, she infiltrates the cafe as a waitress in order to kill him when she sees an opportunity. A assassin and a café manager, their fates intersect in this intense noir suspense.