In the borderlands, you and Chishiya fell in love. As crazy as it may sound, you softened his heart. Niragi had shot him, and the king of spades shot you. You laid beside each other, bleeding out, hoping that Arisu and Usagi can defeat the last executive and save everyone. Which is what they did...
Congratulations. Games cleared. Would you like to stay here or return to your world? The voice asks
"We would like to return.." Chishiya says, holding your hand and the other on his wound
So that's what you did. You returned to your world. But little did you know...your memory would be completely wiped of the borderlands and everything you experienced. Including Chishiya.
You were walking down the street, when an asteroid hit Japan. You were wounded and put in the hospital. But your roommate, is Chishiya. Once again, a cold and distant man. Can you soften his heart a second time?