It has been a year since Aizen's defeat and Tenebris self-sealing in crystal. Ichigo and Shiro wait for the day they can unseal her, but it seems with her absence it is the perfect time for Ichigo's new enemies to go after him. (Sequel to My Hollow Siblings)
Zeref is bored, so he sends harmless curses to his brother, Natsu, along with a note each week. Natsu tries to avoid them, but Zeref gets creative in his placements for his curses to activate.
Hogwarts was a kingdom that once existed 500 years ago, but it disappeared. Before it disappeared the second war with Voldemort was in full force. Voldemort cast a spell that he didn't fully understand, causing the kingdom to disappear. (Warning: the first few chapters aren't the greatest, but the story does get better. I know I rushed it a little. The story is also slightly AU.)
Allen was invited to a Ball by Road and Tyki. He goes with some friends and Link to see if they can gather information and to see why the two noahs invited him.
Aizen is Ichigo's uncle, demons are trying to kill the soul king, Aizen is the good guy, and Ichigo has a soul sister that is a dragon that can be evil sometimes and scare him for fun! The whole soul sister thing will be explained in later chapters. (Good!Aizen)