This takes place before formation of ADA. Fukuzawa is 31 years old. Kurasaki replaces Ranpo.
It had always been as this. Fukuzawa, with a weakness for cute things, would always get himself attached to a child. They both would spend time together, of course, but in the end, Fukuzawa would always lose them. No matter how many times, he always lost them. First Fukuchi, then Okin... Now, it was your turn.
You were a former member of the Special Division for Unusual Powers. Even though you were started only some 6 months ago, you learned quickly. You were scary, yes very much, but you were also able to make yourself appear so, so innocent to fool even Fukuzawa.
As a child you were exceptional. Both your parents had an amazing intellect and that passed over to you as well as they both too are members of the Divison. You were sent to various missions under Ango Sakaguchi, the supervisor and well... They weren't very pretty. Your day was filled with dealing with shady organisations, crime, bloodshed... Your childhood was taken away.
Your parents—as they were frequently part of taking down criminal organizations and what-not—decided to get you a bodyguard, for your safety.
You were an... unusual child indeed. You were quiet, yet that quietness spoke volumes when necessary. One could say you were the smaller version of him. Your head was up in the clouds on most days. Maybe taking care of you was that bad after all...
He was almost—instead of a bodyguard—like a butler, taking care of you.
He knew. Of course, he knew better than anyone else how toxic your household was. Parents being both high ranking members of the Divison, having two other sisters, and to top that all off, your family's been in some problems since the past few years.
You two would spend the days together, and by night when your parents returned you would depart. This was your daily routine for a few months now.
And in those months, well, you could say you've got someone quite attached.