Des:A series in which a woman who wore bloomers during her school days confesses her erotic acts at the time. This time its Kana-chan, a slender and beautiful older sister. In her class, she wore bloomers until the fourth grade of elementary school, and even as a high school student, she wore them as an inner layer under her school uniform. While wearing these bloomers, she immerses herself in bloomer play while talking about the naughty acts she secretly did.