In fact, it is not a full-fledged mission but mostly a cutscene that concludes the main storyline of the game. It kicks off after a fight with the amalgamation which takes place in the mission "Gate to the Underworld".
Within the innermost depths of the gargantuan daidarabotchi, Akito and KK square off against Hannya. Hannya's ritual has reached its final stage, but after Mari interferes, he is thrown into the darkness.
When Mari briefly regains consciousness, she speaks her final words to Akito.
After an amalgamation of souls that was once Hannya manages to drag its warped frame back from the depths of darkness, Akito and KK manage to defeat it in one final battle, putting an end to Hannya's plans forever.
Rewards:
- Transmission Beads
- Music: Ko-omote: Prototype
- Music: Yaseotoko: Prototype
- Music: Abyss: Prototype

