Mika Shimaki works as a debugger at a game company. Just as she finishes her shift one day, a goddess who presides over an otome game world suddenly appears from deep within the screen, asking Mika to enter the game as a Saint and aim for the "All-Character Romance Grand Finale Ending." The game in question, "Child of Prayer of the Furthest Ends," is notorious for being uncleared even by its own debuggers and creators. Pushing too many features loaded the system to its limit, completely bugging out the affection meters—one wrong dialogue choice turns the capture targets full "yandere"!! Thrown semi-forcibly into the game world by the goddess, where correct choices lead to lavish reward scenes while mistakes trigger unmanageable yandere spirals, can Mika successfully win the hearts of these handsome targets and safely return to her original world...?!