An older brother teaching his younger sister. 'Big brother is amazing!' he says while checking answers, but the sister, Nana, falls asleep. The brother says, 'What the hell!' and gets excited looking at Nana's nape. As she doesn't wake up, the brother escalates, peeking into her cleavage and touching her thighs and over her panties. Suddenly, Nana wakes up and gives him a deep kiss. 'Big brother, have you been holding back? It's okay.' Nana has also been frustrated with studying lately. Nana pushes down her brother and strokes his penis while licking his ears and neck. 'No, don't make loud noises or Dad and Mom will wake up,' the brother says as Nana covers his mouth and jerks him off. She then gives him a blowjob. Seeing her brother's erect penis, Nana can't help but mutter, 'Amazing...' Excited, Nana guides her brother's hand to her crotch. As he resists, saying, 'Inside will be bad,' Nana herself inserts it raw! The brother resists, saying, 'Inside will be bad!' But Nana locks him in a scissor hold and doesn't let him escape!
