What the young Colin going through the previous creator's closet didn't realize at that time, was that because of someone that would have become his friend in the previous time-line, once he would start noticing girls, he would fall in love with the 3 that are part of him, his angel, his devil and his angel-devil hybrid. And the feeling would be reciprocated.
Yep, you read that right, Louis specifically wrote that Colin would fall in love with the three reflections of his soul hidden within his body!
He also wrote his former-friend was somehow able to convince all his subordinates "in the know" about the supreme demoness and supreme goddess being the same that his true self, namely Colin, was merely a disguise used to see in person how life on earth was.
To end things he added that, thanks to help from his personal angels & devils, Colin would rapidly develop a way to take on the original creator’s appearance without the help of clothing, just in case any of Colin’s subordinates discovered the truth and he needed to convince them they were wrong.