black mail path be a bitch to her in the beginning aka telling her to fuck herself then proceed until you get another option u need to pick be menacing next thing after that when you need the walk man TALK TO YOUR MOM FIRST THEN SHE WILL SAY GO TO NORIKO THIS IS IMPORTANT after Noriko is done Being a bitch chose to option how long do you want to keep this a secret then boom you get the tits she shows you now further on down the story use that tape to your advantage then eventually she will come to your room and give you a bj YOUR WELCOME MATE