Castle of Black Iron - Chapter 1941 - Loss And Gain

With the Legendary Mechanic System, I transmigrated to Marvel Universe to be Dr. Zola’s assistant.

With Mechanical Force Analysis, I can learn every black technology.

Winter Soldier’s arm? I built a better one for you.

Iron Man’s armor? I already made it a decade earlier.

Doc Ock’s tentacles? I am the one who provided core technology.

Hulk’s mutation? Sorry, I was there and got hit by the radiation too.

As for a certain purple potato, can he collect all Infinity Stones?

……

However, I only had one simple ultimate dream. That is to go home…

- Description from Novelupdates

A spin-off of the various works of Kamachi Kazuma. One day, Kamijou Touma (A Certain Magical Index) faced yet another misfortune. His toilet was broken and spraying water everywhere. As he was lamenting his misfortune, suddenly he appeared in a strange place along with Index and Misaka. Soon enough, more strange people begin appearing…

Includes:

A Certain Magical Index

Heavy Object

The Zashiki Warashi of Intellectual Village

The Circumstances Leading to Waltraute’s Marriage

A Simple Survey / A Simple Monitoring

Killer Princess and Deep End

Sabrina Jewel found out she was pregnant after so many pregnancy tests. The same day, her husband, the powerful President of Jewels Group of Companies in NY city, Robin Jewel, brought another woman home after Sabrina had endured his escapades with ceaseless women and tried to be a good wife.“What? After all the sperm, you could not for once be pregnant. Not even a miscarriage. She did your job for you,” Robin pinned the blame on Sabrina.Sabrina’s world crumbled right before her eyes. She left her family for this idiot but not anymore. His father knew who she was but Robin never took the pain to even research about her throughout their three years of marriage. Since he got another woman pregnant, she was done for good.“I have had enough, Robin. It’s either she leaves or I leave….”

During the day, she was his secretary, working very hard with excellent abilities. At night, she was his bedmate, trying her best to please him, and the two of them were very harmonious in bed. One day, this relationship was on the verge of ending. However, both of them had already become deeply involved and had grown accustomed to each other's presence, falling in love with each other. So...