Son's lewd filial piety; Mother and son's shoulder massage voucher; Reika Honma JUX-549

Hiro, a boy going through puberty, one day witnesses his parents making love. More than the shock of being seen, he longs to have sex with his mother, Reika. Afterwards, Hiro, who had been distancing himself from Reika during his rebellious phase, takes out a "helping ticket"—a gift Reika had given him since childhood—and brings mother and son closer again. His filial piety, expressed in gratitude to his mother, gradually transforms into lewd acts of devotion…