My classmate Mao came to my house, a shy guy whose only hobby is watching porn! Back then she had small breasts, but now they've grown into big ones, and the glimpse of her cleavage fascinates me. She discovered a huge collection of porn I had hidden in my house, and we decided to watch it together. When I noticed her panty shot, I saw that she had a stain on her panty! The two of us were in a room with a frustrating atmosphere, and we ended up having sex without any resistance...!