In This Life, The Greatest Star In The Universe - Chapter 1:

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

In this school fantasy story set in the distant future, creatures contaminated by pollution have overtaken the land, forcing humanity to live in isolated mobile cities called Regios. One such city named Zuellni is a self-contained school in which freshman Layfon Alseif has just enrolled. Layfon reluctantly joins the 17th Military Arts Platoon led by the third-year student Nina Antalk and embarks on a series of adventures.

This is a prequel to the anime movie To Aru Majutsu no Kinsho Mokuroku – Endymion no Kiseki.

Just before the completion of the Academy City space elevator “Endymion”, the main characters Kamijou Touma and Index encounter a level 0 girl named Arisa. The Magicians are after Arisa, and they attack Academy City. A female leader named Shattoaura leads a unit from Academy City against the attack. Kamijou and Index learn from Stiyl that Arisa is key to a brewing war between the sides of Magic and Science. When science and magic cross paths, the story begins with Endymion as its stage!

“If Gao ○○ and Zhen Jingwen both confessed to you at the same time, who would you choose? Heheheh, it’s so hard to choose! Can I just have both?!”

“What do I do if my GF likes BL? Shit! What’re girls reading all that stuff for? They should get married and have kids while they’re still young.”

“How would you guys rate my sister? Let me see…She looks pretty good. Old rules, 10 if she’s up to f*ck, 0 if she’s not, hahaha.”

“Disgusting homosexuals spreading Aids, perverted fujoshis are cancer of society!”

Not only did college student Xia Chuan have stage II advanced straight male cancer, he even had severe homophobia, much less being able to stand the existence of fujoshis. But then, he suddenly met with the greatest crisis of his life—

After waking up, he actually grew an organ only a girl would have between his perineum!

Was this not a dream?

Impossible…

Xia Chuan couldn’t stop his brain from recalling an ancient post on Baidu:

What if you turned into a girl one day?

—First, show your brothers a good time!

De! Fi! Nite! Ly! Not!!!! Xia Chuan pulled up his pants with gritted teeth and swore to defend his virginity to the death.

- Description from Novelupdates