There's a new hero in town and he's got a bad attitude and a chainsaw dog demon! A dangerous combo.
Goblin Slayer: Side Story Year One manga summary:
A prequel series that reveals Goblin Slayer's past and the events that led him to become an adventurer with the sole purpose of exterminating all goblins from the world.
Project SHaDe summary:
In a world that curses humans to morph into beasts, beast hunter Kafka must uncover his elusive past, and receive a revelation that will either bring him to despair or legend.