Koyoi no Maid wa Korosenai

Koyoi, who has lived her life as an assassin, next targets a young master who lives in a large mansion with his butler. She thought she could easily fulfill her objective by infiltrating as a maid, but the master is a creature Koyoi has never seen before, a "trashy womanizer! What is the fate of the two who target each other as prey?!