April 3, 1971

is the Kamen Rider Den-O Edition of S.I.C. Hero Saga, published in Monthly Hobby Japan magazine for Kamen Rider Den-O. Running from December 2008 to October 2009, the story expands upon the events of Climax Deka and Kamen Rider Nega Den-O's travel through time joining forces with the Great Leader of Shocker, with Den-O and Zeronos joining forces with the original Shōwa Kamen Riders to fight them. It features original characters and Negataros's form as .
;Chapter titleshttps://yuican48.tumblr.com/post/64476295701/sic-hero-saga-vol-3-part-3-kamen-rider-den-o
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== Characters ==
===Kamen Riders===
Kamen Rider 1 	Takeshi Hongo
Kamen Rider 2 	Hayato Ichimonji
Kamen Rider V3 	Shiro Kazami
Riderman 	Joji Yuki
Kamen Rider X 	Keisuke Jin
Kamen Rider Amazon 	Daisuke Yamamoto
Kamen Rider Stronger 	Shigeru Jo
Kamen Rider Den‑O Sword Form	Ryotaro Nogami/Momotaros
Kamen Rider Den‑O Rod Form 	Ryotaro Nogami/Urataros
Kamen Rider Den‑O Ax Form 	Ryotaro Nogami/Kintaros
Kamen Rider Den‑O Gun Form 	Ryotaro Nogami/Ryutaros
Kamen Rider Den‑O Wing Form 	Ryotaro Nogami/Sieg
Kamen Rider Den‑O Liner Form	Ryotaro Nogami
Kamen Rider Zeronos 	Yuto Sakurai
===Allies===
*Owner
*Naomi
*Kohana
*Tobei Tachibana
===Villains===
*Negataros
*Great Leader
*Great Leader of Delzer Army
*Scorpion Man
*Wasp Woman
*Man Spider
*Hebinger
*Bat Man
*Koumori Man
*Worm Man
*Ganikoumoru
*Tiger-Roid
*Shocker Combatmen
*Dr. Kate
*Sai Tank
*Pink Rabbit Imagin
==References==
== Notes ==
* The title is the date of broadcast of the first Kamen Rider episode.
Category:S.I.C. Hero Saga
Category:Kamen Rider Den-O
Category:Crossovers