To my surprise, my girlfriend's older sister is a gravure idol who I jerk off to!? When I went to her house, I found out that the gravure idol I'm a big fan of is actually her older sister! The unconscious temptation of her lewd swimsuit has me super excited, and my dick is fully erect! Wow, I can't take it! My dick is at its limit! With the tits and pussy I've dreamed of right in front of me, I can't help but piston away with wild sexual desire!? What should I do!?? I'm going to tell her...