The manga's story begins when iconic villain Doctor Octopus falls into a coma. When he awakens, he finds himself inhabiting the body of Japanese middle schooler Otoha Okutamiya.

A high school student named Yu Komori is bitten by a radioactive spider, which gave him spider-like powers. 

In the year 200X, a supervillain who goes by the name Lord Gokibu wants to steal the fossil of the Insect King, 15 year-old Shou Amano uses his new spider powers to become Spider-Man J, to prevent this from happening. During his time as a superhero, he meets Japanese versions of Elektra, Dr. Doom, Blade, and the Fantastic Four.

High School outcast and Spider-Man fan Yuu leads a life of unfulfilled expectations. But after finding the Legendary Webslinger's suit in an alley, his life makes a big change! What could be lying in store for this aspiring young lad!

In Yu-Gi-Oh! creator Kazuki Takahashi’s epic team-up between Iron Man and Spider-Man, Tony Stark travels to Japan to attend a gaming convention. Awaiting his arrival is Reijiro Kaioh, the CEO of a world-famous card game company. Kaioh plans to unveil an amazing new gaming machine, but the inventor and his device are not at all what they appear to be…
 
(Source: VIZ Media)
 
Notes: 
- The series later had a physical release in English by VIZ Media. 
- The chapters are the 1st and 7th (final) one-shots of the Marvel x Shonen Jump+ collaboration respectively.

Marvel raids Shonen Jump + ?! The irresponsible hero "Deadpool," an extreme outlier even amongst American comic heroes, is finally serialized !!!! A super collaboration manga that involves both the Avengers and Shonen Jump characters!
 
Anyway, Deadpool lands in Tokyo with a bang! What could possibly go wrong when Iron Man invites Deadpool join the Avengers' new Samurai Squad? After all, Deadpool is just in it for the money…and the trip to Japan. This is fine, right?
 
(Source: VIZ Media)
 
Note: Includes 2 extra chapters.

Spider-Man saves Yu, a timid boy from Ohakama City—only for a villain to activate a device that merges Yu and the hero together! 
 
(Source: Viz)

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