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Title: Sigma (Σ, Shiguma)
a.k.a. SI・GU・MA (Siguma)
Circle: Master and Pupil LOVER (MaPL)
Doujinka: Shiwo Honjoh (本城シヲ Honjou Shiwo)
Fandom: Harry Potter
Date/s: March 2002 - December 2004
Type: manga
Size: B5
Language: Japanese
External Links:
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Sigma (Σ), also written SI・GU・MA, is a series of Harry Potter doujinshi by Master and Pupil LOVER. All books in the series feature the Snape x Harry pairing.


Sigma (Σ) was published on March 10, 2002 and contains 52 pages.[1]

This doujinshi has been scanlated into English by Asphodel's Haven.[2]


Sigma 02 (02Σ) was published on April 29, 2002 and contains 52 pages.[1][3]

One seller provides the summary: "Second book in the Sigma series; Harry thinks Snape and Hooch are getting along more than he'd like..."[3]


Sigma XXX (Σ×××) was published in April 2002 and contains 18 pages. It is NC-17 rated.[4]


Sigma 03 (03Σ) was published on August 9, 2002 and contains 76 pages.[1]


Sigma 03.5 (03.5Σ) was published on October 14, 2002 and contains 44 pages. It was reprinted on December 28, 2002.[1]

This doujinshi has been scanlated into English by Secret Garden Scanlations (where it is mislabeled "Sigma 0.35")[5] and into Spanish by Kokoro no Fansub.[6]

Σ<02&03> Sairoku

Sigma 02 & 03 Sairoku (Σ<02・03>再録) was published on August 16, 2003 and contains 108 pages.[7][8] It is a reprint of Sigma 2 and Sigma 3 and contains four color pages.[9]

This doujinshi has been scanlated into English by Secret Garden Scanlations (where it is mislabeled "Sigma 3 & 4")[5] and into Spanish by Kokoro no Fansub.[6]

One reviewer writes:

"As the name of the group implies, it's all about Severus/Harry (well, it's bit one-sided on Harry's part; it's kind of hard to tell what Severus is thinking); also a little bit of James/Severus (again, it looks like it's one-sided). The slash/BL element is quite vague actually; the relationship between Severus and Harry in this one is hovering around the guardian/protege or protectiveness/admiration level, which is a nice change from full-blown teacher/student illicit affairs. The visual style certainly needs getting used to though."[10]

Another fan write: "This is a Harry Potter doujinshi with the pairing Snape/Harry. I really like the art in this, and the story is very interesting, especially chapter 7 [as segmented by Secret Garden's scanlation]. If you like this pairing and fandom, read this. =)"[11]

~Ato~ 04Σ

Sigma 04: Ato (〜痕〜 04Σ) was published on December 29, 2004 and contains 44 pages.[1]

One seller writes:

"This is a soft yaoi Harry Potter doujinshi [...] It was printed in 2004 and is in excellent condition. It is an ultra RARE doujinshi. It was a limited printing and is highly sought after by collectors. Beautiful, moody artwork well suited to an intense story about the love/hate relationship between Snape and Harry."[12]


  1. 1.0 1.1 1.2 1.3 1.4 Master and Pupil LOVER official site. Sold Out 2003. (Archived 13 December 2004 by the Wayback Machine.)
  2. Asphodel's Haven. Doujinshi Translations and Scanlations. Posted 22 April 2008, updated 02 May 2008. (Accessed 19 May 2013.)
  3. 3.0 3.1 Asphodel's Haven. Selling - Master and Pupil Lover. (Accessed 19 May 2013.)
  4. Wanderer Owl. Harry Potter Doujinshi 8. 17 May 2008. (Accessed 19 May 2013.)
  5. 5.0 5.1 Secret Garden Scanlations at LiveJournal. Harry Potter Doujinshi - Sigma 0.35. 18 May 2006. (Accessed 19 May 2013.)
  6. 6.0 6.1 Kokoro no Fansub. Harry Potter Doujins. (Accessed 19 May 2013.)
  7. Shiwo Honjoh's official site. H.P (On Sale). (Archived 30 December 2003 by the Wayback Machine.)
  8. Σ 02&03 再録 at (Accessed 19 May 2013.)
  9. Wanderer Owl. MAPL(Master And Pupil Lover). (Accessed 19 May 2013.)
  10. lee_bella at LiveJournal. A casual HP Doujinshi Review Part 3. 02 April 2007. (Accessed 19 May 2013.)
  11. tanomono at LiveJournal. HP, RPS, KKM, XS, YA, MMORPG, Yaoi Daily. 15 November 2006. (Accessed 19 May 2013.)
  12. eBay auction via Worthpoint. Kizuato (SI GU MA 4). Sold 07 February 2007. (Accessed 19 May 2013.)