Former elite rhythmic-gymnastics athlete Rina Uchimura puts her flexible, toned body to the test in her first anal-sex challenge. After catching her boyfriend in an erotic chat, she learns he is frustrated because she has never allowed anal. He gropes her in the bath and cums in her mouth, then prepares her ass with one finger and two. Following a vaginal warm-up, he penetrates her anally for the first time; she blushes and climaxes repeatedly from the new sensation before taking a heavy anal creampie. Days later, he starts chatting again—now he wants double penetration, setting up the next installment.