Grimgar of Fantasy and Ash: Volume 11 by Ao Jyumonji

"I'll do what I have to. I'll do it. Now."
Gritting his teeth, and bracing his legs, Haruhiro faces the guorella onslaught once more. He rouses himself with a sense of purpose, and tries to avert his eyes from the reality of her death.
Then, when he finds himself facing a regret and despair greater than he can handle, that mysterious man, Jessie, whispers to him, "There is a way. Just one."
Meanwhile, Ranta, having left Forgan, is desperately fleeing his former keeper Takasagi's pursuit. In Thousand Valley, there's no telling when his flight might end. When his stamina and will are pushed to their limit, what is it that comes back to Ranta's mind...?