Full Clearing Another World under a Goddess with Zero Believers: Volume 9 by Isle Osaki

Demon lord Zagan has been defeated! Long live the alliance! After fighting alongside the Hero of Light to drive back the demon army, Makoto Takatsuki finds himself stuck in the infirmary battling a new enemy—boredom. As he sits idle, the alliance braces for another incursion from the demon continent. However, the next attack comes from an unexpected direction: Alexander, the Hero of the Sun, targets Furiae, seeking to take her into custody. Highland’s State-Authorized Hero is a powerful foe...so strong that even Sakurai cannot match him! Meanwhile, Makoto is contacted by the Goddess of the Sun, Althena, who pleads for him to save humanity from the Great Demon Lord. Hunted by enemies and allies alike, can Makoto and his friends unite the continent before Iblis’s resurrection shrouds the world in darkness?