Angela White is napping on her bed. Suddenly the door flies open as the energetic Gia Derza, her roommate, barges in, announcingthat she has something that she just HAS to show Angela! 'What?? Knock first, please, Gia!' Angela exclaims. A couple of days later,Angela is in her room in her bra and panties, nearly finished getting dressed. Gia bounces in without knocking, again, but sheabruptly stops at the sight of Angela's gorgeous tits nestled in the bra. She stares for a moment too long, looking flustered andentranced. Angela storms forward, exclaiming, 'AGAIN?? How many times do I have to tell you to knock first! Get outta here, I'mchanging!' Gia gets chased out of the room by Angela, who slams the door in frustration.The next morning, Angela looks excited as she settles onto her bed with her laptop, biting her lip as she stares at the screen whilereaching down under her skirt, lightly rubbing her pussy while she stares at the screen. Just as she's starting to get into it, the dooropens. 'Hey, Angela--' Gia enthusiastically greets, but Gia is BARELY in through the door before Angela shrieks and shouts, 'NOTNOW!! Why don't you ever knock??'Later that morning, Angela walks down a hallway and stops briefly at a bedroom door. There is a whiteboard with writing on it thatreads 'Gone to the gym. - Gia'. Angela smiles broadly and exclaims, 'FINALLY! Some time to myself!' She turns and hurries into herown bedroom. She wastes no time stripping down and laying face-down, ass-up on the bed. She starts masturbating, saying toherself that she can FINALLY play with her ass, too, for once. Sure, she might be able to finger her pussy fast enough before Giabarges in, but when it comes to the back door, well... She moans as she pleasures herself, sliding a hard dildo into her ass. She rubsher pussy and fucks her ass with the dildo, building towards an intense orgasm. Just as she's about to cum, Gia opens her door. 'Hey,Angela, have you seen my water bottl--' she starts but stops in her tracks, her eyes wide.Angela screams in shock, hurriedly trying to cover herself. Gia stammers a little, saying that she's sorry, though Angela scoffs. No, ifGia was REALLY sorry, she'd have started knocking, like Angela ALWAYS asks, before barging into her room like this. Seriously, is shegoing to have to get a lock for the door? Gia is flustered, saying that she doesn't MEAN to intrude. She... just gets so excited to seeAngela! Angela is a little taken aback by the sweet, sincere words. Her anger fading, Angela says that as much as she likes spendingtime with Gia, sometimes she needs some alone time. Gia shyly but playfully says that it doesn't seem like Angela needs more timeALONE -- frankly, it looks more like she needs some special time with someone else!Angela is surprised, then licks her lips while eyeing Gia. 'Since you're always so eager to barge in, maybe I should show youEXACTLY what I do when I get some alone time,' Angela playfully says as she shows Gia the dildo, licking it sensually. Angela takesGia's arm and guides her onto the bed, asking Gia if she's ever had anything inside her ass. When Gia says that she hasn't, Angelatells her that she's going to show her what it feels like, kissing Gia intensely. Gia squeezes Angela's beautiful breasts, sucking onthem hungrily. Angela strips off Gia's clothes as Gia gets down on all fours. Face-to-face with Gia's luscious ass, Angela spanks it asGia squeals. Biting her lip, Angela lowers her face to Gia's beautiful butthole and begins to rim it softly while Gia moans.Angela's going to teach Gia how important knocking is, ESPECIALLY knocking on the back door.Story inspired by an original submission by Girlsway member, killjoint666!