Anetachi ga Zenin Juudo no Brocon datta

Serialisation of the original work uploaded to Syosetu.

I got myself three sisters in law through my dad's second marriage.

The youngest sister: Natsuki - 17 years old - A third year in high school.

The second oldest: Akina - 23 years old - A university associate professor.

The oldest one: Touka - A 27 year old working adult.

They all have different hobbies and personalities and the only thing they have in common is ―――― that they all are severe brocons?!?

(Source: Kadokawa Sneaker Bunko)