One good storyline could be a young adventurer who discovers a hidden, magical world beneath an ordinary city. They must then learn the rules of this new world and face various challenges to protect it from dark forces that also want to take control of its magic.
A young artist discovers a hidden talent within herself while struggling to make ends meet in a big city. One day, she finds an old, discarded painting in an alley. As she restores it, she realizes it has a magical quality that starts to transform her life and art.
A storyline about a person who wakes up one day with the ability to see people's true emotions as colors. This leads to some interesting encounters as they start to understand the real feelings of those around them, including some secrets that people have been hiding. It could also involve a love interest where the main character has to navigate through the true emotions of their partner.
A lonely old man starts writing letters to his long - lost love from his youth. As he writes, he relives their memories, and one day, he receives a reply. It could be from her, or it could be from someone else who found the letters. This sets off a chain of events that either brings back a lost love or helps him find closure.
A detective is assigned a case of a series of disappearances in a seemingly ordinary neighborhood. As he digs deeper, he realizes that there's a pattern related to an old, abandoned house. The closer he gets to the truth, the more dangerous it becomes, as he uncovers a dark secret that has been hidden for decades.
One of the best is 'Avatar: The Last Airbender'. It has an amazing world - building with four different nations based on the four elements - water, earth, fire, and air. The story follows Aang, the last airbender, on his journey to master all the elements and defeat the Fire Lord. It also has great character development and moral lessons.
'Attack on Titan' presents complex relationships within the context of a post - apocalyptic world where humans are fighting against Titans. The characters have to deal with trust issues, power struggles, and the mystery of the Titans. The story is action - packed and full of twists and turns, making it one of the most popular anime in recent years.