How do you do cremia's notebook entry in Zelda majora's mask?

Answer 1

Ok, first, help Romani with defending the alien invaders on day 1 (Use a Powder Keg to blow up the boulder the first day) by doing the practice stage with her, and then come back at 2:30 a.m. on the same day and the aliens will start attacking. She will give you a milk bottle if you keep the aliens away until 5:15 a.m.

On day 2, come back to the ranch at 6:00 p.m. and Cremia will give you a ride with her to Clock Town to deliver some milk. You can't ride if you haven't helped Romani. The Gorman Brothers, in disguise, will attack you and Cremia. Don't let them get close to the milk. Shoot them with arrows to keep them away. After you help her, she will give you Romani's Mask and she will be in your Bomber's Notebook.