Hira Yakunin Yatte 1500-nen, Maō no Chikara de Daijin ni Sarechaimashita

Hira Yakunin Yatte 1500-nen, Maō no Chikara de Daijin ni Sarechaimashita is a spin off light novel in the I've Been Killing Slimes for 300 Years and Maxed Out My Level series.

Story Overview
A Devil's Work Is Never Done!

Beelzebub is a demon of many roles—minister of agriculture, Azusa's "big sister," and the demon king's closest confidant. Before her illustrious rise to power, though, she was just a low-ranking pencil pusher in the government with no ambitions, no dreams, and no adventure in her life. Then, on a whim of the newly coronated demon king, she received the biggest and most terrifying promotion imaginable! How will Beelzebub handle the sudden responsibilities of the entire Ministry of Agriculture?!

Chapters

 * Prologue: I Was Promoted from Bottom-Tier to Minister
 * Communicating with My Underlings Is a Pain
 * My Parents Visited Me from Home
 * I was Almost Bribed During an Audit
 * I Gathered Plants with Her Majesty
 * I Crushed a Recalcitrant Noble
 * We Renovated the Office Cafeteria
 * I Planned a Trip...Er, a Training Excursion with the Department
 * A Nuisance Fell from the Sky
 * Her Majesty Stayed Over
 * I Want a Bit of Decoration in My Office
 * Epilogue: Going on Dates with Her Majesty on My Days Off
 * Bonus: My Weak Point was Exposed