Marriage for All: From the Start, I Summon Mikoto Misaka!

In Year One of Calamity, all kinds of strange beings began appearing in the world, further shrinking the space where humanity could survive. The firearms that had always been so effective proved utterly fragile against these entities.

That same year, everyone awakened a Marriage System. Men and women alike could choose anyone as a partner and gain their partner's abilities. Once they reached a certain level, they could even summon their partners for a short time.

Monsters, elves, angels, vampires, werewolves, wizards, and all kinds of other races could become marriage partners.

Li Mo, a chuunibyou, transmigrated to this world. His System fused with the marriage system, allowing him to marry an unlimited number of partners and summon them without restriction.

Misaka Mikoto: The lightning dancing at my fingertips is my unchanging faith in this life?

Otsutsuki Kaguya: Where should I put the seeds of this God Tree?

Esdeath: This isn't enough of a fight! Are there even stronger beings? Now I'm getting excited!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.