Gyaru girl AIKA, the older sister, may seem a bit intimidating at first glance, but she's actually caring and kind-hearted, especially toward her younger brother. Working as a cabaret hostess, she visits her brother's room after he's become distrustful of people and stopped going to work. At first, she scolds him sharply: "Hey, what are you doing? Shouldn't you be at work?" But once he opens up about his pent-up worries, she gently offers advice and encouragement, telling him, "Hey, you need to have a little more confidence in yourself!" becoming a strong emotional support. Then, leaning on her affection, he shyly pleads with her to help him lose his virginity... What happens next is waiting for you.