The Strongest Human Is a Maid

To support my adorable vampire little sister, I have no choice but to work at a maid cafe in a maid outfit and stockings, then buy blood packs for her to drink.

To raise the money for the surgery that will cure my sister's vampirism, I have no choice but to sell myself to a rich little girl who claims to invent weapons but actually makes all kinds of strange gadgets.

Even if my sister did something wrong, you don't get to judge her, do you? I'll take responsibility for what she did, but you'll be the ones facing her wrath for making her angry!