Nagihiko, who is already a high school student, has parents who want to immigrate, so her mother entrusts her friend Asahina Miwa to take care of her. For convenience, Nagihiko needs to transfer to Metropolitan Yode High School and live in Asahina's house with thirteen Asahina brothers. (I haven't watched Brothers War, so the plot may be a mess.)
However, life is rough, and a wild cat attacks Nagihiko at night from the window of Nagihiko's room.
Have "friendly" exchanges with Asahina's brothers no matter what.
No matter what happened, I encountered a murderous tennis ball and was injured.
I ran into a vampire for nothing.
The last thing is... Fuck, Nagihiko broke out! (The butt lifts the table (╯‵□′)╯┻━┻)