Log Horizon (2013)

S1E3 The Depths of Palm

Serara, a young woman from the "Crescent Moon Alliance," finds herself captured by enigmatic men in the northern city of Susukino and desperately needs rescue. Shiroe and his companions set off to save her. Frustrated by the bland in-game food, they head north and venture into "the depths of Palm," a decaying network of ancient mining tunnels. Inside, they encounter chilling creatures lurking in the shadows...