Ashida Mamoru is a god-tier manga assistant but his habit of turning authors lazy has left him without a job. Luckily, one of his classmates from university happens to have a little sister who is a serialised manga author in need of an assistant. This author, however, needs some… handy stimulation to work. Will Mamoru be able to keep it civil and professional? Is such a notion even possible in the first place under those conditions?