How do I describe this...
Retriever is a visual novel with alright graphics and an interesting aesthetic/design. However, that's as much as I can really say.
The story starts out with a mystery of the MC dying without a trace of their memory or existence, however the MC is about as excited and emotional to try and learn his past as a plank of wood. Additionally, he never really has a clear goal in mind, just kind of wandering around aimlessly until the next event occurs. Characters aren't great either, with most of the ones you meet in the beginning either too nonchalant / apathetic to really take a liking towards or not compelling enough to give a reason to like them.
Overall, this game is meh. The visuals are pretty good, but the story feels like a slow bog and the characters aren't very memorable.