Kokoro, a beautiful girl from a motherless family.One day, her mother, Mary, who works at a snack bar, brought her stepfather, Kita.Kita showed her sexual intercourse with Mary to Kokoro, and when she invited her lust, she made her heart beat.I carefully caress her so as to plant her pleasure, and penetrate her hymen.It didn't end there, and Kita let the debt collectors violate her debt.She continues to be fucked by vile men, and eventually Kokoro awakens to her masochistic tendencies...