When Mum leaves her cigarettes at home her step-daughter Misaki spots them and calls her pal Pia who comes over to take advantage of a chance for some fun chain smoking with Mum's cigarettes. In part 2, they smoke and sway with the music-- standing arms wrapped around or close to or facing each other while smoking hands free, dragging deep and nose exhaling in an insanely erotic scene. After that they relax together on the sofa, cuddling and smoking.