The first light novel written by <y>Aya Yajima for Kimetsu no Yaiba containing five chapters, as well as an afterword. 
 
1. Shiawase no Hana 
Takes place after the Drum House arc and centers around Tanjiro, Zenitsu, and Inosuke bonding while attending a village wedding. 
2. Dare ga Tame ni 
Takes place after the Natagumo Mountain arc during a "date" between Zenitsu and Nezuko. Zenitsu begins to reminisce about his past encounter with a woman named Sayuri. 
3. Uranai Sōdō Tenmatsuki 
Takes place after the Infinity Train arc. Shinobu attempts to cheer the Kamaboko trio up by sending them to buy sweets. On the way back to the Butterfly Mansion, the trio encounter a fortune teller. 
4. Aoi to Kanao 
Shinobu sends Kanao to accompany Aoi on a trip to the apothecary. 
5. Chūkōikan ☆ Kimetsu Gakuen Monokatari 
Modern-day school alternate universe where Zenitsu has had enough of the Morals Committee and begs his friends to help him quit the club. A seemingly easy task becomes complicated when all of the teachers turn out to be unreliable.

The setting is Taisho era Japan. Tanjirou is a kindhearted young boy who lived peacefully with his family as a coal seller. Their normal life changes completely when his family is slaughtered by demons. The only other survivor, Tanjirou's younger sister Nezuko, has become a ferocious demon. In order to return Nezuko to normal and get revenge on the demon that killed their family, the two of them depart on a journey. From a young talent, an adventure tale of blood and swords begins!
 
(Source: Shonen Jump)
 
Notes: 
- Includes two extra chapters. 
- Nominated to the 24th and 25th Annual Tezuka Osamu Cultural Prize.

Tags