KK-097 - The gynecologist brother and his perverted sister

I watched this because I'm a fan of Mai Yuzuki. She's featured prominently on the cover, but Kirihara gets twice the screen time. Kirihara was active with deep kissing, but her reactions after penetration were a bit subdued. The fellatio at the end of her segment might be the highlight. As for Yuzuki, after a little bit of manual stimulation, she gave a lukewarm 50-second blowjob, and even after penetration while clothed, her reactions were minimal—it just wasn't very exciting for her standards. The subsequent fellatio scene had way too many unnecessary cuts, making it hard to get into.