The story follows Vincent Brooks, a man who is beset by supernatural nightmares while torn between his feelings for his longtime girlfriend Katherine and the similarly named beauty Catherine. The gameplay is divided between the daytime, where Vincent interacts with the characters in a social simulation, and his dreams where he must navigate three-dimensional towers through combined platforming and puzzle-solving. The game's ending is affected by choices made by Vincent over the course of the story.
The initial story was written by Hashino, who originally worked alone on the scenario before other writers were brought on to help. The scenario's main writer was Yuichiro Tanaka, previously lead writer for the Persona series. The setting incorporated both Japanese and American influences. Hashino felt that Catherine was an ambitious title due to its themes and subject matter, saying that no-one but Atlus would have supported the project. The main theme is love between men and women, although in its infancy the project was themed around conflict. In order to make the love triangle between Vincent, Catherine and Katherine sound realistic, he asked other members of Atlus staff for their experiences. One story, where a woman detailed killing people in her dreams, was almost directly referenced within the game. Vincent was a very unlikeable character, but based on staff feedback he was adjusted to appear more sympathetic. As the initial premise could not be changed, the team instead added Mutton's plot and worked to make Vincent a more sympathetic character within this framework.
In an unnamed North American neighborhood in which Vincent lives, there have recently been a number of bizarre incidents in which people die in their sleep with a look of anguish on their faces. Strangely enough, the only common link is that all of the victims are young men. The story quickly spreads throughout the media, attracting widespread attention and theories as to the unexplained cause of death. A strange circulating rumor begins to spread that if a person dreams of falling, then they must wake up before they hit the ground or they will be unable to wake up at all and will die. Dubbed "The Woman's Wrath", it is said that all of the dead men cheated on their partners.
After meeting Catherine, Vincent begins to have nightmares every single night, which he believes may be related to the rumors. In these dreams, he and several other men, who appear to each other as sheep, must escape from various horrors trying to kill them, for if they die in their dreams, they will die in reality. As dreams and reality begin to blend together, Vincent must not only fight to survive, but must choose between Katherine and Catherine. Vincent can't force himself to bring his new relationship with Catherine to an end.
Proudly supports Cardboard VR, after being inspired by 360 Giantess channels, this game gives you the unique ability to travel anywhere around the room and get the exact angles you want from a Giantess. You can always switch back to regular mode which would allow you to fly or climb. - Inspired by Sizebox & Dreams.- Toggle Edit Mode where you have full control over how your Giantess behaves and where to place them in the map.- Roam around the Map shrunk to the size of an ant and explore giantess with or without Cardboard VR in First Person or Third Person perspective.- VR mode will freely allow you to walk or sprint forward automatically by staring at an Icon on the floor which is toggled. - Enjoy a realistic giantess fantasy simply on your mobile phone with cheap equipment and hassle free discovery of download links.- Many Unique Camera Dynamics that improve the feel of being small (Includes Depth of Field option & Shoulder Cam)- Shoulder Cam which allows you to view what your player is witnessing in another third person mode.- Play as 3 characters which are Antboy, Wilson & Lisa 2b1af7f3a8