The Messy Two-Dimensional Life

I have the Sekiryuutei's Cage in my body. I have an older sister named Sakura Mitsuru, and a younger sister named Miyuki Shiba. When I was a child, I had a adopted sister named Kotori Itsuka. An alien princess named Lala suddenly appeared in the bathroom and asked me to marry her. When I ran to enjoy the meteor shower, I was hit on the head by an all-purpose angel. Although I am the fourth true ancestor, I am only a student in the academy. An ordinary high school student studying in the city lives in an apartment called the Demon Hall. Unfortunately, there is an earth-bound spirit named Long Niang Qiqiqi in the house. Recently, he is hunting down a red apostle hidden in the Gancheng Glory Amusement Park. Because he accidentally rescued a giant dragon named Thor, he is now engaged in the so-called maid war with Robert and Rolbert - this is the life of my two-dimensional protagonist. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.