I am so sick of "I'm a lesbian but SEX ISN'T SEX UNLESS PENIS so obviously I need to have some men rape my crush."
It's especially irritating here because it's totally unnecessary for this series of events. Erika's already raping Tsubomi to begin with, she could just be into gangbangs and force Tsubomi into that too. All it would take would be different dialog on page 15. Everything else could stay exactly the same.