"If you're going to take off your mask, it's better to take off your bra." My step-sister, who has never taken off her mask outside of her room, is shy and doesn't take off her mask!

My new step-sister, who was born after my parents remarried, has always worn a mask at home, even when I'm in my room, even when I'm eating. The mask is now part of the face. However, even though he has become a family, his older brother can't really see his sister's face, so he can't help but want to see his true face! So he tries to persuade him, but he gets a shocked comment saying, "I'd rather take off the mask." However, I want to see raw breasts too, so I accept this compromise, and of course I get an erection when I see my breasts! And then...