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Stepmother's Sin (義母 Gibo, lit. Stepmother) is a 2001 eroge produced by Guilty.  It inspired a two-episode original video animation(OVA) erotic series directed by Digital Works.

Plot Edit

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Yusuke Yagami remembers a heartbreaking memory of his mother's adultery. During his childhood, Yusuke witness his mother having extremely passionate sex with her lover in their home during his father's absence,and to his heartbreaking despair, Yusuke's mother is immensely enjoying the sex and shown to have absolutely no remorse about cheating on her husband.  Traumatized forever since then Yusuke assumes all mothers are secretly cheating sluts who deserve whatever suffering they might get.

Characters Edit

Yusuke Yagami

Yuusuke's a college student that lived alone ever since his father and mother divorced but his life will change once his father remarries a beautiful widowed woman and he suddenly gets a step-mother. Accompanying his step-mother is also her daughter, Yuusuke's new step-sister. With the introduction of new family members, Yagami residence perhaps will not be as lonely as before. But with new residents in the house, something else burried deep in Yuusuke's subconsciousness will also awake. The past traumas of his biological mother's adultery will resurface once again and will come back to haunt Yuusuke. Will his new 'mother' be able to soothe his anxiety or will she just simply become a victim.

Shinohara Mio

Yuusuke's cousin Mio is a high school student that goes to the same school as him. She is a honor student who enjoys being a class representative. She's got a calm, relaxed type of personality. She likes putting up a facade of being a "good girl" while in secret she has a hidden side of hers that loves sex. Although Mio considers Yuusuke a mere plaything, she'll feel disturbed by the prospect of losing him from her grasp once Misako moves in to Yuusuke's residence.

Misako Yagami

Misako is Yuusuke's father's new wife. Her previous husband died three years prior to the beginning of the game's story. The relationship between Misako and her new husband is nothing more than a marriage of convenience for Yuusuke's father's company and there is no real affection between them. A yearning for something that she couldn't express has freed Misako's forbidden desires, as her relationship with her new step-son started to grow more and more complex.

Yusuke Yagami's biological mother

Yusuke's biological mother who unknowingly traumatized her only son by having extremely passionate sex with her lover in their home during his father's absence, and to his heartbreaking despair, Yusuke's mother is immensely enjoying the sex and shown to have absolutely no remorse about cheating on her husband. She later divorced her husband after a long series of sexual adultery sessions with her lover.