SNOS-403 Even during class, I'm the classmate who gets secretly fucked every day at school by that horny teenage girl bursting with sex hormones. Shirakami Saka.

"Whiteu-san! You'll get caught!" "Just shut up. …Hurry up and put it in?" I never thought such an unusual daily life would come to me…---One day during class, I was blankly staring at the cute but quiet Whiteu-san from my seat behind her. Her back looked cute too, I thought, when she suddenly started moving strangely. She's masturbating! He was groping his crotch with his hand!! And on top of the desk, there was a smartphone hidden under textbooks, displaying a huge dick taking up the entire screen! Even that serious-looking Shirakami-san was jerking off during class… When I noticed, I started jerking off using her as material. I jerked off intensely and came. My underwear got dirty. I glanced forward and saw Shirakami looking this way. Our eyes met. Shit... did I get caught? The end-of-class bell rang, and Shirakami approached me. "Come to the empty classroom on the third floor later?" My heart pounding, I went there... and found Shirakami in see-through, perverted underwear. I forgot I was at school and pounced on it in excitement. The thrilling campus sex with Shiragane began.