Chillin' in Another World with Level 2 Super Cheat Powers, Volume 8

With a display of his prodigious power, Flio brings the conflict between humans and demons to an uneasy halt. At last, he can explore the possibility of peaceful coexistence between the two forces. Then Flio discovers that his time manipulation magic had a terrible cost: it cut off Wyne, the wyvern girl in his care, from her kin—forever! Rys and the rest of Flio's companions watch on as his regret drives him to desperation...Can Flio's friends help him bear the terrible burden of his incomprehensible abilities? If they can't, their whole world may be in danger!