There is a lot of content here. 

Gameplay: has a Persona feel to both combat and social. The combat has a weakness down mechanic, an all out attack when all is down. Social wise, good amount of exploration and variety. 

Story: follows a similar vein to the anime, with cameos and references to the manga. It isn't even inferior in terms of quality; sure plot points might be the same, but the author inserted their own jokes that make it feel like it is the actual original source

Art and Sound Design: fantastic. Art isn't top tier, but fits well with each scene. The music and sound effects are basic, but well executed. 

It isn't a game to get your rocks off. But it is great game with some H scenes mixed in. A good slow burn with actual fun mechanics. A strong love letter to original source made by a true fan.