Ayaka was an ordinary office worker who commuted daily on the crowded subway. One sweltering evening, standing in the crowd, she felt someone stealthily approaching. A pair of scissors slashed through her clothes when she wasn't looking, and in that instant of exposure, her body trembled inexplicably. A voice whispered in her ear, hands explored in the darkness… Ayaka could never forget that day, that memory of shame and pleasure that resurfaced every night afterward.