The 7 Palaces in the game represent the Seven Deadly Sins. In order they are Lust, Vanity, Gluttony, Sloth, Greed, Envy and Pride.
As of 2017, it takes a place among the top 10 user rated games on IMDB, having a rating of 9.7
There are ten different sequences for the Valentines Day scene. One for each female character you romance, one with Ryuji and a bonus one where you are called out for romancing every female characters at once.
The persona Arsène is named after the popular gentleman-thief Arsène Lupin, created by Maurice Leblanc.
If you fail to steal the hearts of any Palace in the game within the time limit, you will be taken to the "Game Over" sequence. In this sequence, it shows a flashback of when the police arrest you and Sae Nijima no longer interrogates you allowing the main character to get shot.