From Viz:
Miaka Yuuki is an ordinary junior-high student who is suddenly whisked away into the world of a book, "The Universe of th Four Gods". There she becomes the priestess of the god Suzaku, and is charged with finding all seven of her Celestial-Warrior protectors.

Yui Kusanagi, is the daughter of a Shinto shrine. She discovers a mysterious sword, which transports her to a different world where she meets the Greek god Zeus. He invites her to attend a school in a separate world that he created. Zeus intends to teach the meaning of love to the various young divine beings who also attend the school, in an attempt to reverse the weakening bond between humans and the gods.

Note: The 3rd volume is an ebook only.

Mira peacefully resided in a magical world until a blow to the head caused her to partially remember her previous life in Japan. The protagonists in reincarnation stories always end up having to deal with trouble, which is the last thing she wants. Alas what awaited her was the selection exam for a magic academy and naturally her special cheat ability was discovered then.
A fantastical tale of a reincarnated girl who doesn't want any cheats.