3.578 out of 5 from 41 votes
Zen is a man with no past; he can't remember anything except for intense urges to kill, steal, and be a menace to society, making waves wherever he goes. After kidnapping the daughter of a general, Zen finds himself embroiled in a conflict between citizens of Amata and Galay, leading him to question his past once more. Together, Zen travels with a cowardly doctor to discover the truth behind his murderous ways...
While their plots are a bit different, both manga contain a male protagonist who is a killer that can't remember his past. Both manga are fairly violent and contain plenty of good-looking male characters. Also, both manga have a somewhat similar tone, in my opinion. I think that if you liked one, you will probably like the other.