Have I Been Transported into an Urban Light Novel?

[Brother controls sister] + [Daily] Ringo, who stayed up late playing galgame, was finally punished by God and died suddenly at the table. However, he accidentally traveled to a world full of brisk urban daily life. There is also a gentle and addictive sister beside me. I thought that the years are peaceful, but in fact, there are secrets hidden, and dangers are everywhere under the warm appearance. When the black mist fills the entire island and monsters emerge from it, no one can be spared.