From the Steam Store page:
Explore the pleasures and horrors of love as Vincent, a man with a hard choice to make: marry his long-time girlfriend Katherine or move on to the incredible blonde he just woke up next to — named Catherine! But beware! Make the wrong choice, and you could end up dead. Delving into themes of free will and the delicate nature of relationships and the choices we make, this action-adventure-puzzle game is an experience unlike anything else.

From ATLUS’ all-star team that brought the Persona series to life, and animation by Studio 4°C, known for anime movies ‘Memories’ and ‘Tekkon Kinkreet Black & White’, Catherine Classic is a masterwork in stylish presentation and design.