Before she could form conscious memories, Sayuki lost her mother. Then during her student years, she lost her father… The family that raised the directionless 'Sayuki' was one that ran a local dojo. Raised strictly by her stubborn stepfather, as Sayuki grew up and got married, she began to admire him more and more despite his stubbornness and awkwardness. One afternoon when her husband was not home... During practice, Sayuki accidentally injured her stepfather. Amidst her panic and growing unease, forgetting her guilt towards her husband, she touched her stepfather's groin.
