This took me the whole week! (maybe more) ;O;
Hope you like it. I know the story may be confusing so I'll explain it.
Night elf story:
She has lived since the time Aszhara was defeated by Tyrande and Malfurion, but in the battle between high elves and night elves her sisters dissapeared; she was a high elf so she started using magic to get back her sisters, but she was caught by the sentinels.
She spend a lot of time on prison and when she came out, she kept doing the same; but this time the consequences of using magic came, and turn her into a naga. She felt stronger and more evil; so she tried to kill the first night elves that were in front her, but the draenei stopped the fight.
The draenei was watching over the night elf long time ago, because she liked her. The draenei started to know better the nigh elf, and like her even more so when she saw her as a naga and having a fight with the night elves she decided that would turn the naga into a night elf again with her "good" magic and make her see that she was doing things the wrong way.
Undead story:
Just the girl that never wanted to be an undead, so her blood elf friend help her to look like a human again (or something like a human). The undead wanted to do her life again with a human, and all normal stuff but never realized the blood elf was in love with her; that was the reason why she helped the undead to look better; the only thing she wanted was to see the undead happy.
At the end, when the undead was about to marry the human, she saw the blood elf crying and moved her heart; and so she realized she had never loved the human and always has been in love with the blood elf, her best friend.
And all the things the undead never explained were that she loved the blood elf, but never told it. Then the blood elf said it was the biggest mistake of the undead, because she could had a normal life with the human but she decided to have a strange life with the person she loves.