Natsutsuki, an office worker who dotes on her brother, Touma. Ever since I met him, he's been like an angel. But he's now a college student, so maybe it's time for her to leave her brother. One day when she was thinking that, she got drunk and got close to him defenseless... suddenly he kissed me! Caressing the tip of her sensitive chest as if loving it... I can't think of anything about her sweet numbness. "I'm already this wet." When I thought he was relentlessly attacking my wet pussy with his tongue, no matter how much I came, he wouldn't stop...!