A transmigrator accidentally became Muzan Kibutsuji from Demon Slayer. To survive and achieve the laid-back life of his dreams, Miss Muzan gets to work!
Miss Muzan's diary:
Year Ten: I've decided. I'll rebuild the Twelve Kizuki, find some reliable and capable people, and make sure to get some JIO-level biological agents, too...
Year Fifty: Playing games with Miss Tamayo.
Year Sixty: Playing games with Miss Tamayo.
Year Seventy: Muzan, Muzan, how could you sink so low! At this rate, that invincible man will utterly destroy you!
Year One Hundred: Playing games with Miss Tamayo.
