On the anniversary of his mother's death, Kurosaki Ichigo travels to his mother's grave. When Rukia arrives, Ichigo leaves to speak with her; but what she has to say upsets him. His sisters have a much bigger problem, however: they're being attacked by a particulary vicious Hollow with a few tricks up his sleeve. But this isn't any ordinary Hollow! Could it have something to do with the death of Ichigo's mother? Ichigo must discover the truth and fight the Hollow on his own to protect his pride.
An akuma is a soul which has been brought back to life through sadness and despair with the powers of Millenium Earl. Their mission is to terrorize the earth and all who dwell within it. The Black Order is a group of Exorcists that have sworn to cleanse the souls of the akuma, and collect the substance known as "innocence". This powerful substance can be used as an anti-akuma weapon, and ultimately can help destroy the evil Millenium Earl. Allen Walker is a young Exorcist who has the ability to tell who is human and who is an akuma with the help of his cursed eye. Together with the Black Order, Allen must find all 109 pieces of innocence to protect the world and defeat Earl.
If you enjoyed watching Ichigo fight a hollow in Bleach: Memories in the Rain, then you may want to check out D.Gray-man as it also features a teenage boy, with a lot of power fighting an evil monster.
Naruto Uzumaki is a young ninja who bears a great power hidden inside him, a power that has isolated him from the rest of his village. As such, his only dream is to become the Hokage - the most powerful ninja, and leader of the village; but first he needs to graduate! With his inability to perform even the most basic ninja techniques, it seems that all Naruto has going for him is his determination to succeed no matter what. Teamed up with the genius Sasuke, book-smart Sakura, and their team leader Kakashi, Naruto embarks on his quest to become the Hokage. But with outside forces posing a threat to the entire Hidden Leaf village, Naruto discovers that he must become much stronger if he ever wants to realize his dream and protect the friendships he's forged.
If you enjoy the action aspect of Bleach: Memories in the Rain, then you may want to check out Naruto. Both feature young central characters who contain exceptional power, so if you liked this, then give Naruto a try.