History Webcomic / WhatIfIKnowTooManyReasonsICanBeStrong

%%* NotSoDifferent: [[spoiler:Tanjiro told Nezuko that he and Muzan are not so different]]

* SparedByTheAdaptation: [[spoiler:It's implied that Tanjiro being far stronger than his canon counterpart saves almost everyone from their canonical deaths.]]

->'''Giyu Tomioka''': Dear Sakonji Urokodaki, I have sent you a boy who wants to be a demon slayer. A demon murdered his family, took away his eye and arm, and turned his sister into a demon. She didn't attack humans, and the boy rejected the blood injected by Muzan into him. But...\\

* AdaptationalNiceGuy: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to make more demons but also taking his eye and arm away. However, Tanjiro nearly killing him in Asakusa and killing most of the Upper Kizuki humble him enough that he lets go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thanks them for serving him for a long time.

* TookALevelInKindness: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to make more demons but also taking his eye and arm away. However, Tanjiro nearly killing him in Asakusa and killing most of the Upper Kizuki humble him enough that he lets go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thanks them for serving him for a long time.

* DeathByIrony: [[spoiler:Kokushibo used to be nothing but Yoriichi's caring brother, only to turn into a demon out of jealousy for Yoriichi's exceptional talent. Tanjiro kills him with the flute he made for his brother to blow for help.]]

* AdaptationalNiceGuy: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to make more demons but also taking his eye and arm away. However, Tanjiro nearly killing him and killing most of the Upper Kizuki humble him enough that he lets go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thanks them for serving him for a long time.

* TookALevelInKindness: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to make more demons but also taking his eye and arm away. However, Tanjiro nearly killing him and killing most of the Upper Kizuki humble him enough that he lets go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thanks them for serving him for a long time.

* ExpressiveMask: When Nezuko briefly gains a cleft chin in Chapter 18, Urokodaki's mask briefly moves its eyebrows and mouth with surprise.

* SparedByTheAdaptation: [[spoiler:Almost everyone who have died in canon survives their canonical fates here. Emphasis on ''almost''.]]

* AdaptationalNiceGuy: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to turn them into demons but also taking his eye and arm away. However, Tanjiro nearly killing him and killing most of the Upper Kizuki humble him and makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* TookALevelInKindness: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to turn them into demons but also taking his eye and arm away. However, Tanjiro nearly killing him and killing most of the Upper Kizuki humble him and makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* ExpressiveMask: When Nezuko briefly gains a cleft chin in Chapter 18, Urokodaki's mask moves its eyebrows and mouth with surprise.

* AdaptationalNiceGuy: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to turn them into demons but also taking his eye and arm away. However, Tanjiro killing most of the Upper Kizuki makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* TookALevelInKindness: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family in an attempt to turn them into demons but also taking his eye and arm away. However, Tanjiro killing most of the Upper Kizuki makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* AdaptationalNiceGuy: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family by injecting them with his blood but also taking his eye and arm away. However, Tanjiro killing most of the Upper Kizuki makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* TookALevelInKindness: Muzan starts out as the same monster as his canon counterpart, not only killing most of Tanjiro's family by injecting them with his blood but also taking his eye and arm away. However, Tanjiro killing most of the Upper Kizuki makes him benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

* AdaptationalNiceGuy: Tanjiro killing most of the Upper Kizuki makes Muzan benevolent enough to let go of Kokushibo and Akaza, the only remaining members of the entire Twelve Kizuki, and thank the two for serving him for a long time.

'''Demon in the Temple''': Stop already!!\\

The webcomic loosely adapts the source material, the main difference being that Tanjiro Kamado becomes the Black Swordsman that terrifies even demons after losing not only most of his family but also his eye and arm.

* AdaptationalBadass: Tanjiro is much stronger than his canon counterpart, from dividing the boulder just under thirty minutes during his training to terrifying even Muzan like how Yoriichi did.

''[[https://www.pixiv.net/user/29448170/series/81948 What If I Know Too Many Reasons I Can Be Strong?]]'' (もし強くなれる理由を知りすぎたら, ''Moshi Tsuyoku Nareru Riyū o Shiri Sugitara'') is a ''Manga/DemonSlayerKimetsuNoYaiba'' fan comic by [[https://twitter.com/osker0190 Osker]], full of references to ''Manga/{{Berserk}}''. It loosely adapts the source material, only to take an entirely new direction after the Red Light District arc.

Tanjiro Kamado turns into the Black Swordsman that terrifies even demons when Muzan Kibutsuji kills his family, maims him, and turns his only surviving sister Nezuko into a demon.

** In the pixiv version of Chapter 11, Tanjiro kills Nakime the same way Sephiroth does to Aerith in ''VideoGame/FinalFantasyVII''. Doma tells him afterward, "[she] will no longer talk, no longer laugh, cry... or get angry... What about us... what are WE supposed to do? What about my pain?".

* CurbstompCushion: Akaza and Kokushibo hold their own against Tanjiro and are able both give and put up a decent fight even with him in the Armor of the First Swordsman. Considering that his battles against other demons -- including other Upper Ranks like Doma -- have been rather one-sided, this is quite an impressive feat that makes it fitting for their status as the strongest members of the Upper Ranks in the first place.

* ShoutOut: To ''Manga/{{Berserk}}'':
** Tanjiro has Guts' black clothing, huge sword, and muscular build.
** Haganezuka names Tanjiro's sword the Demon Slayer.
** Chapter 5 has Tanjiro escape the LotusEaterMachine by quoting Guts to his past self.
** The Red Light District arc has Tanjiro say he's to sell himself for three silver coins, the same price as when Gambino pimped Guts as a child.
** Chapter 11 reimagines Yoriichi Type Zero as the Armor of the First Swordsman, a reference to the Berserker Armor.

'''Giyu''': The boy has gone insane. I know it's a selfish request to make, but I would like you to raise him.\\

* EstablishingCharacterMoment: Tanjiro establishes himself as an AxCrazy AdaptationalJerkass by torturing the demon in the temple with a SlasherSmile after Muzan kills most of his family in front of him, takes his left arm and right eye away, and turns his surviving sister into a demon in the first chapter.

* HeWhoFightsMonsters: Tanjiro is as vicious as the demons he hunts. The final chapter reveals that this is why [[spoiler:Nezuko, who bears no ill will against Tamayo or Yushiro, attacks him several times]].

* DeathByAdaptation: [[spoiler:In the final chapter, Tanjiro kills himself to stay human and be with the rest of his now mostly dead family. His canon counterpart survives long enough to have a new family with Kanao.]]

* {{Telepathy}}: The final chapter reveals that [[spoiler:Tanjiro's]] demonic transformation has given him the ability to read not only the minds but also the forgotten memories of demons. [[spoiler:This explains why he could bully his enemies by taunting them about their former human lives.]]

* BittersweetEnding: [[spoiler:Muzan and most of the other demons (except for Tamayo and Yushiro) are now dead and nearly everyone survives their canonical fates, but Tanjiro is revealed to have become a demon just like in canon and kills himself to stay human and be with his dead family.]]

* DeathByAdaptation: [[spoiler:In the final chapter, Tanjiro kills himself to stay human and be with his dead family. His canon counterpart survives long enough to have a new family with Kanao.]]

* KilledOffScreen: Tanjiro kills Doma, Hantengu, and Nakime between Chapters 11 and 12.

** Muzan escapes when Tanjiro is about to attack him with the Demon Slayer in Asakusa.

* {{Telepathy}}: The final chapter reveals that [[spoiler:Tanjiro's]] demonic transformation has given him the ability to read not only the minds but also the forgotten memories of demons. This allowed him to bully his enemies by taunting them about their former human lives.

* {{Telepathy}}: The final chapter reveals that [[spoiler:Tanjiro's]] demonic transformation has given him the ability to read not only the minds but also the forgotten memories of demons.

%%* YourHeadAsplode: Kokushibo's fate.

* BittersweetEnding: [[spoiler:Muzan and most of the other demons (except for Tamayo and Yushiro) are now dead and nearly everyone survives their canonical fates, but Tanjiro became a demon just like in canon and kills himself to be with his dead family.]]