This is the fifth volume of the I've Been Killing Slimes for 300 Years and Maxed Out My Level manga. It was released on September 12th, 2019.
- Chapter 26 - Azusa vs Beelzebub (Part 1)
- Chapter 27 - Azusa vs Beelzebub (Part 2)
- Chapter 28 - We Threw a Barbecue Party
- Chapter 29 - A Fake Witch of the Highlands Appeared
- Chapter 30 - We Helped the Witch