Demon Lord Awakening

Demon Lord Awakening (魔王覚醒編) is the fifth volume of the That Time I Got Reincarnated as a Slime Light Novel.

Synopsis
WHEN IT RAINS, IT POURS!

Despite Rimuru's absence, things seem to be proceeding fairly smoothly in the newborn nation of Tempest. But there's trouble brewing elsewhere: The nearby Kingdom of Farmus's top brass are planning an invasion of Tempest, and at the same time, Rimuru's friend, Milim Nava, has declared war on Tempest's ally, the Beast Kingdom of Eurazania. As if things couldn't get any worse, all communication between Rimuru and their crew back home has suddenly gone silent in their hour of need! Tempest may be in for some hard times ahead - but this steadfast slime isn't throwing in the towel just yet. They have a plan... and it's downright demonic!

Chapters

 * Prologue: The Day of Ruin
 * Chapter 1: Calmer Days
 * Chapter 2: Prelude to Calamity
 * Chapter 3: Despair and Hope
 * Chapter 4: The Birth of a Demon Lord
 * Chapter 5: The Unleashed
 * Epilogue: The String-Puller in the Shadows

Adaptations
This volume was adapted into the following material:

Manga:
 * Manga Volume 12
 * Chapter 55: Natural Enemy of Monsters
 * Chapter 56: Entangled Intentions
 * Chapter 57: Bringer of Misfortune
 * Chapter 58: Disaster
 * Manga Volume 13
 * Chapter 59: Despair and Hope
 * Chapter 60: The Conditions for Hope
 * Chapter 61: The Witch's Punishment
 * Chapter 62: Whether Monster or Human
 * Chapter 63: Moment of Counterattack
 * Manga Volume 14
 * Chapter 64: Difference in Class
 * Chapter 65: Megiddo
 * Chapter 66: Merciless
 * Chapter 67: The Worshipping Demon
 * Manga Volume 15
 * Chapter 68: Birth of a Demon Lord
 * Chapter 69: Tempest Revival Festival
 * Chapter 70: The Day of Eurazania's Fall
 * Chapter 65.5: Clover at Death's Door
 * Manga Volume 16
 * Chapter 71: The Unleashed
 * Chapter 72: Swirling Plots

Anime:
 * Episode 27: Paradise, Once More
 * Episode 28: The Scheming Kingdom of Falmuth
 * Episode 29: Prelude to the Disaster
 * Episode 30: The Beauty Makes Her Move
 * Episode 31: Despair
 * Episode 32: Hope
 * Episode 33: Putting Everything on the Line
 * Episode 34: Megiddo
 * Episode 35: Birth of a Demon Lord
 * Episode 36: The One Unleashed
 * Episode 37: The Visitors