COMIC Penguin Club Sanzokuban 2012-04 Vol.279 [Digital]
[Ishigami Kazui (RED CROWN)] Oshiete Sensei (COMIC Penguin Club Sanzokuban 2011-03)
[Ishigami Kazui (RED CROWN)] Kawaii Imouto no Kyougaku na Yuuwaku (COMIC Penguin Club Sanzokuban 2011-05)
COMIC Penguin Club Sanzokuban 2007-07
COMIC Penguin Club Sanzokuban 2013-03
[Ishigami Kazui] Onee-chan to Yonde!? (COMIC Penguin Club Sanzokuban 2010-06) [English] [HeiXYin]
COMIC Penguin Club Sanzokuban 2012-06 Vol.281 [Digital]
[Ishigami Kazui] Tsundere-san to Otaku-chan | Tsundere-san and Otaku-chan (COMIC Penguin Club Sanzokuban 2011-09) [English] [EHCove]
COMIC Penguin Club Sanzokuban 2013-04
[Ishigami Kazui (RED CROWN)] Natsu to Test to Osananajimi (COMIC Penguin Club Sanzokuban 2010-08)