Mysterious Play

Miaka Yuuki and her best friend open an ancient book in a library and get pulled into a world that looks like imperial China. One of them gets sent back almost immediately. The other, Miaka Yuuki, gets stuck — and learns she's been chosen as the Priestess of Suzaku, which means she has to track down seven Celestial Warriors, summon a god, and earn three wishes. She's fifteen, she didn't ask for any of this, and the first warrior she meets is Tamahome, a cocky fighter with a mysterious symbol on his forehead who she can't stop bickering with. You can probably guess where that's going. But what makes this 52-episode TV series hit different is the relationship between Miaka and Yui, her best friend back in the real world, who's reading the book as events unfold. That friendship gets complicated in ways that genuinely hurt. The whole thing is built on Chinese mythology, reverse harem dynamics, and a story that isn't afraid to go darker than you'd expect from its early 90s shoujo look. Studio Pierrot adapted it from the manga back in 1995, and it still holds up as one of the genre's defining works. If you liked Yona of the Dawn's warrior-gathering structure, or Inuyasha's blend of romance and feudal-era danger, or The Vision of Escaflowne's girl-transported-to-another-world setup, this is the show that walked so they could run.