Wandering Emanon

In the sequel to "Memories of Emanon," our eponymous heroine continues her journey through time, carrying with her 3 billion years of memories.
When Emanon reunites with her long lost twin brother, confessions are made and secrets are revealed that will make her question her way of life and the very nature of her existence.

The first half of volume 1 is the colored chapters "Wandering Emanon" (published before as Emanon Episode: 1).
The second half is "Wandering Emanon '67" which is set before "Wandering Emanon."