What happens when your parents go have fun and leave you behind?
You get stuck paying for their fun. Literally.
The story centers around three sisters who's parent's left home alone to go be adventurist. They thought it was all going to be fun and parties until an 'old man,' as they say, knocks on their door and they find out their parents left them with a debt. A debt they have to repay. How? The 'old guy' has a grandson, the schools future inheritor, who happens to go to their school, he wants to rid the school of bullies. For that to happen a 'special secret service' gets created to protect the peace inside the academy.
There's the oldest one, Yuri, who is the one who loves to party but has recently calmed down. The middle sister, Nobara, is the fashionista one. The youngest one, Ran, she is the "normal" one of them all.
The sisters even though they are alike, as sister often are, they are also very different. One thing can be said, I wouldn't mind having any of them as my sibling, they are amazing and won't let you down, even if they don't always see eye to eye.
The art is good, it's actually what made me open this manga at first. Not to mention the sisters unique wardrobe style.
This manga has comedy, romance (hinted and exclusive), and mystery.
Only in a manga would parents leave their three teenage daughters in charge of their house...