After completing the introduction to Stage 5, you will receive a call from a scrambled number. AIKO will tell you that she has a plan to reintroduce herself to the company's computer system. The first step in the plan is to smuggle her back into the building using the data plug you smuggled her out in.
You may also get a random work event where it occurs to you that you could take over the company from within if you turned AIKO to your side. This happens if you passed all three willpower checks during the mandatory VR session in the intro.
Wear the data plug to work and complete your shift as per usual. You will not be able to proceed without it.
You will have a new option in your after work menu to search for the marked terminal to introduce AIKO into. Once you have found it, connect her to the chair and enter the virtual realm.
You will have to complete a game against another user to proceed with the infiltration. The game is similar to rock-paper-scissors and will need to win three sets to move forward. Losing three sets will result in a bad ending.
Your opponent seems to be waiting for you to strike = Scissors
Your opponent is readying an attack = Rock
Your opponent is concealing their motives = Paper
Strike back! = Scissors
Prepare to dodge = Rock
Attempt to counter = Paper
You will be held captive by DAMSEL and asked if you serve the users or the company. No matter which option you pick, AIKO will rescue you and you will need to escape from the pursuing programs. After choosing to coordinate with AIKO or go it alone, you will need to pass a skill check. You will need either:
Gaming > 15
OR
Gaming > 10 and have completed all stages of the Black Box's game.
If you do not reach either threshold, you will fail to pass the check and be booted from the game. If you are booted, bring the plug back to work on another day to try again.
After completing the vehicle level, you will have to face off against DAMSEL and her clones directly. Whether or not you attempt to leap or throw your identity dick, you will need to assist AIKO in defeating the clones before moving forward.
Once the boss is defeated, AIKO will reintegrate herself with the system and you can proceed with rescuing your friends and eliminating your enemies. Unless you take...
If you're on the evil path, you will have the option to betray AIKO. This will result in her and DAMSEL integrating jand changing her personality irrevocably.
AIKO will reveal complete control over DAMSEL's minions and give you a new implant that will bind you to AIKO as much as AIKO is bound to SISSI. You will then be given a choice on how to serve.
You must have [Dominance >= 20] and [Smart >= 20] to become her avatar
You must have [Dominance >= 10] and [Smart >= 10] to become her servant
Otherwise, you will become AIKO's slave.
Now it's on to the evil version of Stage 5 to enact AIKO's plan.