Night Shift Nurses Kranke is about Hikaru and her sister Ai.
Story: 9/10. I get it. Hirasaka wants Hikaru to be a good slave and it's preventing her from taking care of Ai. He says to her "I told you. You should open your ass more." I don't know what that means but he means to literary do it. Now, the last episode is the best moment: Ren and Hirasaka are married. The flowers get passed onto Hikaru, the wedding bell rings, and the swans are flying eternally. But..... Hirasaka invents a drug and puts it on Ren's body. The drug radically accelerates a woman's pheromone secretion. He jerks her off. Ren loves Hirasaka.
Art: 10/10. Surprisingly great art.
Sound: 9/10.
Characters: 8/10. Hirasaka is still sadistic.
Enjoyment: 9/10. Except that one Honey and Yogurt Scat Scene and the Ren scat scene in the ocean.