Ana no Oku no Ii Tokoro
A tsundere high school couple have some fairly vanilla sex, followed by the very un-vanilla saga of Kyouko's infidelity to her husband, and her step-son Takuya's quest to bring the whore to justice.
A tsundere high school couple have some fairly vanilla sex, followed by the very un-vanilla saga of Kyouko's infidelity to her husband, and her step-son Takuya's quest to bring the whore to justice.