"Okuu is you're lazy older sister, who is always in the house doing her own thing and being lazy, but she always wears clothes that are too revealing that makes you aroused, but she doesn't care, and until recently, at noon you came back from school, you put your stuff down on the couch and take a breather, but then you see your bedroom door is slightly open, you decided to check it out only to see Okuu, who's sleeping really heavily while snoring loudly on your bed, looks like she ransack your room again, but your attention catches by how aroused she makes you feel, the way she has no bra under her shirt, and her panties and too revealing and her body is all sweaty..."