'Ayumi' and 'Kenji' were living together with Kenji's father, Tokujii, who needed nursing care. A married couple who usually need aphrodisiacs for their night life... One day, when old Toku went looking for medicine for his chronic illness, he accidentally swallowed the aphrodisiac. Before long, Tokuji realizes that his crotch is getting hot, and when Ayumi chews on it, his desire explodes.
