"The Magic Guild of Female Supremacy: Contracted as an SSS-Rank Mage's 'Mana Battery'"

"Devote your magical power—and your chastity—to me!"

Contracts are absolute.

This is a world of female superiority, where only women can wield powerful magic. Men either possess no magical power or are considered to have only negligible amounts.

But I, Yuuto, somehow harbor limitless magical power—and an SSS-Rank genius female mage named Silvia sees right through me.

"Interesting... you have fascinating magical power. Starting today, you're my exclusive 'mana battery.' Sign the contract."

Unable to resist her overwhelming strength, I find myself working as Silvia's mana battery and personal attendant.

Night after night, I'm summoned to her chambers to supply magical power—and, it seems, my chastity as well!