Sooner Or Later You Won't Be

It's the tail end of the 1920's, but this world is a bit different from our own. Long ago monsters rose from their homeland of the underground and began assimilating with the human population, as the decades went by human and monster culture shifted to accommodate one another, while technology and weapons advanced magic dwindled and became less mainstream, while cities of monsters began to rise. While tensions between humans and monsters have always been there, the intermingling is on the rise. Now our setting, the city of Fellend, is a cultural hub of monsters and humans. Crime is rampant in the streets and police are corrupt while gang violence is high. Our protagonist, a Teenage human named Frisk, has recently traveled to Fellend to find her older sister Chara, who moved to the city when Frisk was young. Frisk expected to find her sister easily but only learned that her sister has disappeared and all the thousands of gold in debt her sister had has now been transferred onto frisk. Apparently Chara racked up the debt at the 'Wingding brothers Casino' and was last seen there. Can Frisk find her sister and pay off the debt? Or will her morals be compromised in the city of sins and vice?

(Inspired by 'sooner or later you're gonna be mine' by Vade on YouTube.)