10musume 052426_01 Secret Selection ~Please Look at Yuka Negishi's~

A deep dive into the vagina, the root of all humanity, for a thorough investigation!
We thoroughly examine Yuka Negishi's delicate amateur using various instruments!
First, I thrust a Cusco that makes a cold clicking sound! While Yuka-chan looked anxious as she felt the coldness of metal inside her vagina for the first time, I got to see deep inside her vagina! She seems nervous, so maybe her vaginal temperature is set higher?! I wonder if the temperature changes before and after the ascent?!