easy, just repeat the delivery and get perfect score everytime, if you get 1 wrong you lose one point, idk how it works but in example you need 10 points if you do everything perfect you get 1 poit but if you miss 1 you lose 1 point, you need to repeat every delivery to get the scene, but beware if you answer its not satisfactory for the girls you will have to do everything again, so if you want to prevent this you should save the game before or after you click the scene