On the train, I was showing off my underwear no matter what anyone thought. She induces an erection in me and seduces me with a suggestive attitude, saying, "Did you just see my underwear?" Even though she was talking as if I was in the wrong for having an erection, she was excited to see me showing it off! She gets so wet that a naughty stain spreads on her underwear, and she transforms into a horny woman who wants to get fucked and grabs my erect penis! Was she showing it on purpose after all? *This work is a work that includes one person selected from the already released "HUNTB419". Please note that the content overlaps with other works that include multiple people, so please be careful if you have already purchased it.