After the shoot, Honoka-chan is in a relaxed mood after a shower, but then the staff invites her to join them! It's not a date invitation, though! It's a game-like invitation to have sex: "Would you like to try the standing doggy style championship?" If Honoka-chan can make the man cum using only the standing doggy style within the time limit, she wins! With that simple rule, her partner and a male actor appear. He's not going to lose either! His fighting spirit is burning, his cock is hard and he's ready to go! With Honoka-chan's ass sticking out, he gives in to his instincts and gets fucked hard, covered in carnal desire! What will happen in the standing doggy style championship?