After School: A Vocaloid RPG is a unique survival-horror role-playing game designed for Windows, utilizing RPG Maker VX Ace. In this game, players assume the role of Oliver, who finds himself trapped in a mysterious alternate dimension known as the 'Spirit World.' This realm is under the influence of a single corrupted spirit, presenting numerous challenges and dangers. Players will navigate through this eerie environment, encountering various spirits and characters while striving to help them and ultimately escape the clutches of the corrupted host spirit.

The game draws heavy inspiration from notable titles like End Roll and Ib, combining elements of survival horror with a compelling narrative. The initial concept was inspired by the song 'Crushed Mary' by Mondaiji-P, adding a unique musical layer to the experience. Players can expect an engaging storyline complemented by atmospheric graphics and a rich world to explore, making After School: A Vocaloid RPG a noteworthy addition to the genre.