If you can withstand the superb technique of Serina Tachibana, you can endure the raw vaginal cum shot, otherwise you can have reverse anal! When Seri-chan was told that she would receive a prize if she could lead all the contestants to ejaculation within the time limit, she was so excited! What kind of erotic technique will Seri-chan show us? And will the contestants be able to endure it?! The final shocking development!