When she woke up… her colleague, Yui, was next to her in her underwear! "You were amazing last night," Yui smiles. Ito, who can't remember anything, is stunned as Yui starts telling her about last night... The previous night, drunk and with no memory, she was enthusiastically led to lesbianism. The next morning, sober and with no memory, she is seduced again while trying to resist. A two-stage lesbian fall sex that is too stimulating for a straight woman! Her body, developed into a sensitive one, gradually begins to seek lesbian pleasure on its own.