Masa Inn only has one website, i.e. www.masainn.com,
www.masa-inn.com is a fake one.
I contacted Masa-inn.com's staff from the contact form. They told me Masa Inn is full during the period i want to book, and advise me to book another villa. Somehow i feel weird and fortunately i managed to get Masa Inn's direct email from Bali Travel Forum. I contacted Yasri, she/he confirmed my reservation and told me that they only have one website which is masainn.com.