Old man Yamada is shocked to find out that his old friend has a lover. He decides to call a delivery health service for the first time in his life. The girl who shows up is a busty black gal named Ruka. Old man Yamada is excited by her young body. He tries to force himself on her, but he loses his erection and goes to bed. Worried about it, Ruka goes to Yamada's house later and revives the old man who is on the verge of orgasm with her blowjob technique.