A gentle, smiling older sister next door asked me to have sex with her for three days and three nights, and I cum inside her. (Kase Nanaho, EKDV-589)

I'm a student who came from the countryside to Tokyo and is living in a dormitory after failing an entrance exam. The dormitory supervisor's daughter is Nanaho, an office lady who usually lives in the dormitory. Although she's older than me, she's cute and everyone admires her. And then, for some reason, she starts teaching me...