A big sister who works as an instructor at a cram school. Her way of speaking is polite and her intelligence shines through. Fast-talking women are great, aren't they! First, I try using a huge electric massager on this seemingly serious girl. At first, she was avoiding it with a smile, but gradually her expression became serious, and before she knew it, she had a serious cum stain that was bulging in the middle of her panties... After this, a full-body sensual massage begins with a big-breasted masseuse and an actor as a pair. In the process of gradually transitioning from pressure points on the back and waist to a sticky sensual torture, she tries to force a smile and speak in polite language, but she feels a twitch and her speech becomes incoherent. She's usually so serious that she's stiff, but in reality, she's more sensitive than anyone else, and she ends up cumming while spilling stringy serious juice and recoiling... The big dick in front of her is sucked into her mouth and inserted. The cram school teacher who usually doesn't give off an erotic vibe has a tongue-lolling, high-faced expression, and screams as she cums. Among the sullen perverted girls that are overflowing in the world, this is definitely a top-class transformation!