Kaa-san no Nude Model o Shite Itara, Kaa-san no Panchira Mite Bokki Shite Shimai, Soshite...... 母さんのヌードモデルをしていたら、母さんのパンチラ見て勃起してしまい、そして……。, I was acting as a nude model for my mom, but then... I caught a glimpse of her panties, got a boner, and well...
Doujinshi
