Sweet Middleground 3 ~the lost keys~

Antigone is asked to display her clock as the center piece of an exposition, bringing about technical issues and emotional distress. For which she typically garners Vincent's help. But when Vincent goes back to his apartment, he finds that his keys are gone, and the doors were unlocked. As he inherits the issues and distress, Antigone now must provide the help.
If you've played the previous games, this one is the chronological sequel. Although playing the previous ones isn't required to understand, it helps understanding the character development. The series sees the introduction of several new characters, but the focus is still on Vincent and Antigone, and the romance side of things gets developed too. I'm mostly expanding for the future, the main focus didn't change.
The graphics got a fully custom update, and the animated portraits are still here. The game is still the same kind of puzzle-ish visual novel, this time with a mystery oriented plot in addition to the slice of life core.