Tsubasa: Reservoir Chronicle is a mindfuck created by CLAMP, the king of mindbenders. Do not judge this manga by the poor anime adaptation, it’s great.
Bakuman is the story of two friends trying to fulfill their dreams together. It is a simple story which is taken to whole new level with the great set of characters and outstanding storytelling.
Nana is the tale of two strangers with the same name who end up living together. Their friendship grows as they try to help each other through hard times and try to live their lives as they had dreamed.