Grashros
A manga that takes place during the time of early man about a boy born with a curse that vows to kill the Mammoth who destroyed his tribe.
This series was pretty unique with it’s Paleolithic setting. The only other series with a similar backdrop is Sousei no Taiga.
The same creative team made the As the Gods Will shonen series and you can tell they’re taking full advantage of now doing a seinen series as they don’t shy away from sexual content. The final confrontation was particularly ridiculous as it involved the protagonists literally manifesting his hatred into a “rage boner”.
I will say the writer did a good job of introducing fictional verbiage used by these characters to reflect them being early man. They used that along with including some modern influences into the world, such as a tribe who’s into rapping, that somehow awkwardly worked.
I liked it.
~dakazu