Yukina, a dark-skinned gal, has to live with her grandfather due to her father's circumstances. Unlike her strict father, Yukina loves her kind grandfather. One day, she discovers an adult video in her grandfather's room. This triggers Yukina to want to repay her grandfather, who doesn't have much time left, and to feel Kokoro for lonely old people... Please look forward to the obscene licking and entanglement between a real old man and a dark-skinned gal!