Kono Subarashii Sekai Ni Shukufuku Wo! - Kazumegu Will Get Married In 100 Days (Doujinshi)

Chapter 17.5: ...seems Like Megumin Has Seen Kimetsu No Yaiba...
Chapter 17: Day 17
Chapter 18: Day 18
Chapter 17: Day 17
Chapter 18: Day 18
A parody of (https://mangadex.org/title/44625/this-croc-will-die-in-100-days)