Generation MZ threesome

The first story of a former detective and current private inspector.
Hye-sook and Yoo-jin are a lesbian couple that love each other.
One day, Hye-sook finds out Yoo-jin is seeing another man and warns the man to stay away.
However, the man ends up threatening her for her life. Hye-sook wants Yoo-jin back so she seeks a private eye, but a few days later, she goes off grid.
The private suspects she’s been kidnapped and finds Yoo-jin to find out the whereabouts of Hye-sook…