Am in agreement with all what you are writing, except about Irina/Dizi:
In one night she had both of the porndudes inside of her ??? And betrayed her 'friend' Tanya by fucking her boyfriend in the shower.
She didn´t fuck in the shower, she is lesbian and has problems touching the man sexually. her attitude could be clearly watched when she gave massage to Akira, enjoying to rub her kitty on his ass. Such things she knows from sex with other women - and likes it. All trial of him to touch her pussy with his hand, she maneuvered elegant around. In the shower she played the porn game with dry humping.
For me - she could stay with her nice round ass...