A film featuring Uehara Yui, known for her exceptionally long tongue that reaches down to her chin. This work is packed with erotic scenes showcasing her tongue's unique length, including deep tongue blowjob, full-body licking, and slow, sticky kissing—allowing full appreciation of her tongue's allure. Every scene includes tongue insertion and cum swallowing, delivering realistic expressions of pleasure. Additionally, it features a reenactment of Uehara Yui's real-life sexual experience with her actual older brother. Based on a true story, this work blends intense realism with eroticism, creating a powerful incest narrative filled with tension and arousal.