Chapter 145

Box of Happiness (せの) is the one hundred and forty-fifth chapter of Koyoharu Gotōge's Kimetsu no Yaiba.

Summary
The chapter beings with Kokushibou standing over Kaigaku offering the him the opportunity to become a demon and get stronger.

Characters in Order of Appearance

 * Kokushibou (flashback)
 * Kaigaku(flashback)
 * Zenitsu Agatsuma
 * Shihan (flashback)