Office lady falls from a building is reincarnated into another world and ends up at the Devil Kings castle. Can she save him from the bad ending?

this story start in a investigation laboratory (kek) in japan, where is investigate an Exotic Matter, but to have a trouble with this matter, is it a second epiphany night?

A collection of one-shots by various authors.
"Ready Go!"
by Yoshii Yuu
"Peach Or Lemon"
by Kuramochi Mari
"The Flower That Blooms In You"
by Mitsuya Omi
"Field Trip On Monday"
by Torikai Akane
"Snow, Piling Up Feelings"
by Kimura Ayako
"Senpai And His Girlfriend" ~Call My Name~
by Nanba Atsuko
Click Additional Info for summaries of each one-shot.
(Source:MangaUpdates

Yuuichi Tate is overjoyed: He gets to go to a brand new high school. Of course, then he just happens to find out the school he choose is under frequent attack by strange creatures called ''Orphans'', and the school set up a special task force of female members called ''HiME''s, using various elements as their powers, to battle these invaders. That's not all, though. Each member of the HiME task force has their own, unique ''Key'', another person whom, upon being discovered, can team up with the HiME to create a ''Child'', a combative unit specifically needed to effectively battle these Orphans. And with Yuuichi's luck, he just happens to find out he's not just the ''Key'' for one of the HiMEs, but for two... Two highly competitive, rival schoolgirls. And that's only the start of the trouble.
(Source: Tokyopop)

ES members Éclair and Lumière were once involved in a battle to decide the fate of the galaxy. They prevailed and peace was restored. Now, several years later, the galaxy once again stands on the brink of chaos. This conflict will see the dawn of two new heroines; Ascoeur and Q-Feuille.
(Source: AnimeNewsNetwork)