Succumate

On a boring summer day, upon arriving home, you discover an unexpected guest—a succubus named Lilim—who informs you that she has come from the demon world to collect human energy through semen and needs your help to meet her quotas by the end of the month. However, strange deaths have been reported in the city of single men living alone, found emaciated in their apartments, raising the unsettling possibility that Lilim may be involved and in danger, prompting her to conduct her own investigation to uncover the truth behind these events.