Isekai Cheat Magician (2019)

S1E6 Defense of Azpire

Following their victory against the golem in Azpire, Taichi and Anastasia come across the young sorcerers Milu and Melo, who lead a massive swarm of Red Goblins. At the same time, Rin and Myura warn the guild of an imminent assault from an army of thousands of monsters. A heavy atmosphere settles over the group, but Rin and Myura are determined to protect the city. Just when they need support, Lemiya shows up, having sensed something amiss within the city...