Kagurai Youe manga
A tie-in manga for the otome dating game simulation by the same title: Nanami Haruka wants to be a song writer, so she attends an idol training school filled with beautiful bishounen. The school pairs each aspiring songwriter with an aspiring idol, but Haruka finds herself paired with 3 idols! To make things more difficult, Nanami is also not allowed to date any of her beautiful partners!
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.