Well, start with the most basic gross "man abandons woman he got pregnant" story. I don't know if my mother was in the industry at that point, or wound up there because of what happened, but I grew up more than in than out of the red light district in Shinjuku.

Then she killed herself, and I was sent to foster care.

[He stops there to take a too-long drink of his coffee, because he needs to regulate.]

I came across information about Shido and manifested my Metaverse powers about the same time, so I ingratiated myself with him by doing his dirty work. In exchange for me being his teenage hired gun, he helped me set myself up as a miracle detective for the media. It's easy when you can get a confession out of a suspect's Shadow on the other side - you just have to narrow the pool enough that you're not running around Mementos doing a needle-in-a-haystack bit.

My plan was to build him out and take him down at the height. Looking back, I was an idiot, but hindsight and the wisdom of age and all.

[He'll pause there, to gauge reactions, and also because, as flippant as he is about how that plan fell apart on him, he needs a moment to figure out how to talk about it falling apart.]