also known as the "Mysterious Play", Fushigi Yugi is a shoujo ("girl", but it can be for guys too) by manga artist yu watase. its about this girl named Miaka and her friend Yui who get sucked into the Shi Jin Ten Chi Sho (The Book of the Universe of the Four Gods). Through many events, Miaka and Yui become enemies. In order to save the world, Miaka must gather the Suzaku Seishi (Suzaku Celestial Warriors) as Suzaku no Miko (Priestess of Suzaku) and summon the beast god, Suzaku. A very good, touching, romance story. With TONS of cute guys. ^^ (Warning: You WILL need tissue)
Fushigi Yûgi is my most favoritest manga/anime series ever!