Surrounded by four armies of dark beasts, five humanoid races strive to push the known boundaries of the world. Unfortunately, the 13 heroes dispatched to the southern region are easily wiped out by Clevatess, one of the Lords of Dark Beasts. Determined to get revenge against humanity, Clevatess bursts into the capital of the Kingdom of Hiden, leaving a trail of death and destruction behind him. Although the situation looks desperate, humanity still has a chance to appease Clevatess' anger. Alicia Glenfall, one of the 13 heroes, is revived by Clevatess to help him raise a newborn infant, Luna, whose choices shall shape the fate of the human world. Although reluctant to help the dark beast at first, Alicia understands that Luna is the only thing that stands between humanity and complete annihilation. Hiding himself by taking on a human form, Clevatess sets out in search for a wet nurse with Alicia and Luna. With Clevatess unwilling to reveal his identity, it falls on Alicia to slay all enemies that stand in their way. Meanwhile, the neighboring countries prepare to advance on the weakened Hiden, aiming to control the only forge capable of producing the heroes' weapons.

The second season of Shin no Nakama ja Nai to Yuusha no Party wo Oidasareta node, Henkyou de Slow Life suru Koto ni shimashita. A once-great Hero is now living the slow life. Red, shunned from his adventuring party, spends his days running an apothecary. He lives with his lifelong love, Princess Rit, and his sister, Ruti. They indulge in moments of bliss, like soaking in serene hot springs and enjoying delicious meals with a view. No matter what happens to the world around them, these happy moments will be unchanged.

The movie is a continuation of the story from the original series that takes place half a year later. The original team joins an alliance to help take back the area around Unato Castle, however things do not go as planned. Will Ikoma and his friends be able to survive, or will they fall to the hordes of Kabane?

High school student Sora Kashiwagi is accustomed to receiving bizarre presents from his father, who is on an expedition around the world. Unfortunately, these gifts have been nothing but nightmares. As a result, when his father sends him a huge package from Egypt, Sora prepares himself for the worst, only to be greeted by Mii-kun—a cute, pint-sized mummy! While initially wary, Sora soon learns that Mii-kun is harmless, a delicate creature yearning for attention. Throughout their amusing day-to-day lives, the unlikely pair meet other people with unique pets, while also strengthening their bond together. Although keeping a pet is a difficult task, Sora is set on caring for the lovable Mii-kun. [Written by MAL Rewrite]