Moving in with My Step-sister ^1.2.1s

After graduation, I lived alone in a big city, far away from home, in order to pursue my dream.
In contrast to the hustle and bustle of the big city, my daily routine and work were always the same, split up by nothing but a daily commute between home and the restaurant I worked for.
I thought I'd just live a quiet life, plain as water, until one day I got a phone call...
SpoilerThe voice on the other end of the line was my mother.

"Well, your sister has found a new job, this time in the city where you live, so she'll be coming over to stay with you for a few days. Please take care of her."
Before I could respond, my mother hung up the phone quickly on the other end.
"Ah..." After I put the phone down, I felt restless.

The sister she mentioned on the phone was actually the daughter of my stepfather and his ex-wife. Although we had lived together since we were children, we were more like friends than siblings.
Suddenly, we had to live together for a few days. Even though she was my sister, I couldn't help but feel nervous...

Game is avaialble for Windows