During summer vacation, I returned home and reunited with my sister-in-law Kana. Her see-through dress revealing her panty line had me hooked! At night, I peeked into the bedroom and saw her blushing while adjusting her clothes—my excitement exploded. The next day, I witnessed her masturbating and couldn't resist thrusting from behind… The situation is irresistible. This work fully showcases Kana's beautiful buttocks, from start to finish, a treat for butt lovers. The transparent panty scenes live up to the title, with clever use of light making the T-back clearly visible, and the doggy-style thrusts are incredibly erotic. The creampie scene is spot-on; it would have been perfect with one more scene at the entrance, but I bought it on a 10-yen sale and found it super cost-effective and satisfying. The story is well-crafted, and fans of Mito Kana will definitely love it. However, the sex scenes always involve wearing panties, which might not suit everyone. Some lose interest when the male actor appears, but Kana's charm shines in this work.