A completely ordinary amateur female college student who has hardly ever masturbated, has never had an orgasm, and has never thought sex feels good, undergoes sexual development and transforms into someone who becomes wildly excited. Three months ago, she was dumped by her ex-boyfriend who said, 'Sex doesn't ignite for me. I prefer more erotic women.' Before she knew it, she picked up an adult video her boyfriend often watched, and without understanding anything, she aspired to appear in an AV.