Rei Aoki, a stunningly slender beauty, appears in this release. Meeting through a dating site, she turns out to be an unexpected figure—Rei, the wife of the protagonist's older brother. Using this secret to his advantage, the younger brother begins demanding sexual favors. To cheer up his heartbroken brother, the two decide to drink at home. As the alcohol takes effect, their relationship takes a forbidden turn. This release fully includes two films titled "When the Drunk Sister-in-Law Gets Lewd..." A complete showcase of her irresistible allure.