Cant find hentai manga

i need help finding this hentai manga of a girl who is bestfriends with this guy who helped her in this school where she was bullied by her classmates primarily female but flashing forward hes walking her to her apartment on her birthday I cant remember if he had his friend there but he has to leave him there with his friend to go get her present but while hes gone his friend locks the door to her apartment and traps her and starts to seduce her which slowly works and has sex with him while enjoying and regretting it thinking about her bestfriend who is planning on asking her to be his girlfriend with the gift which is some necklace but when he gets to the apartment he notices the door is locked and he hears her having sex with him and starts crying as his boner grows and they all climax together

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