- Japanese release date: May 27, 2015
- Japanese ISBN: 978-4-757546-56-1
- English release date: November 17, 2015
- English ISBN: 978-0-3163-520-93
- Cover character: Baldroy
- Extras title: Black Grade School Student
- 098. "The Butler, Responding" (その執事、応答, Sono Shitsuji, Ōtō)
- 099. "The Butler, In a Rage" (その執事、狂暴, Sono Shitsuji, Kyōbō)
- 100. "The Butler, Breaking Out" (その執事、脱走, Sono Shitsuji, Dassō)
- 101. "The Butler, Crossing Paths" (その執事、遭逢, Sono Shitsuji, Sōhō)
- 102. "The Butler, Exterminating" (その執事、掃討, Sono Shitsuji, Sōtō)
Volume 21 gallery
The alternate cover of volume 21.
The inside cover of volume 21.
The image from the back cover of volume 21.
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