Havenfall is For Lovers

My partners, chasing after my vanished sister, were kind-hearted "monsters." At the end of our joint struggle to uncover the truth, a dangerous love transcending species ■Story The heroine lives with her sister in the American rural town of Havenfall. However, one day her sister suddenly goes missing—!? On her quest to find her sister alone, everyone the heroine meets turns out to be a monster! A vampire town doctor, a werewolf sheriff, a djinn boss at her part-time job, and even a devil! The heroine believes they are the culprits who kidnapped her sister. However, the real culprits are a group antagonistic to them... To get her sister back, the heroine decides to work with these monsters! As they work together, the heroine gradually finds herself drawn to the very human hearts that lurk beneath their monstrous appearances... What will become of the love between a human and a monster...?!