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This one-shot is contained in a book called 7 Ways to Become Absolutely Beautiful (Omoikkiri Kirei ni Naru 7 Nana -tsu no Houhou) (思いっきりキレイになる７つの方法). Additional information about this book is as follows: No one will call you ugly again!; You'll become beautiful and score a fabulous love!!; Because this is a collection of super techniques to make you absolutely beautiful! (Source: ShoujoMagic)