Seven’s route in Deep Story , along with its "Secret Endings," is widely considered the "true ending" of the original game, as it reveals the primary plot secrets.
In the context of the game Mystic Messenger , "Deep Story" is one of three primary gameplay modes. It is more plot-heavy than "Casual Story" and is essential for uncovering the game's core mysteries.
It typically requires a specific amount of in-game currency (hourglasses) to access. Other Possible Interpretations
You can only unlock the romantic routes for 707 (Luciel Choi) and Jumin Han in this mode.