I belong to the university's manga research club with Shion. She lives for Comiket, and because she kept failing to finish her doujinshi, she ended up repeating her third year—three times. A true otaku hermit. On our way back from the long-awaited annual Comiket, we're suddenly caught in a guerrilla downpour. Our clothes and all our purchases are soaked. Considering the situation, we decide to take shelter at my place. When she takes off her wet clothes, I finally see her big tits—hidden until now under those frumpy outfits. Her nipples show clearly through the soaked tank top, and I can't look away. Watching me stare, my dick naturally starts to swell. Shion notices and teases me with a laugh, "You're not seriously a virgin, are you? lol." ...Sorry, but yeah, I am. The atmosphere gets awkward, but then she says something incredible: "Wait, really a virgin? Sorry... You helped me at Comiket, so... if I just let you touch them a little...?" My excitement skyrockets. I start groping her breasts wildly, but she scolds me, "A little gentler, please!" Still, she gently guides me on. Happily mounting me in cowgirl position, she takes my rock-hard cock inside. Finally, my cherry is popped—she rides me hard, slamming her hips! Hitting deep inside her, she climaxes over and over! Even after my first cumshot, I stay rock hard—pumping thick creampie after creampie deep into her pussy! "I have class tomorrow, but I want to keep having sex all day... Maybe I'll just repeat another year lol." ...I think I'm gonna repeat too... Sorry, Mom and Dad...