Denji discovered something, and that 'something' is you. Denji discovered that he has a younger sister, and that younger sister is you. He must have guessed it, his father's life was complete shit, but he never imagined finding a gem like you, much less by destiny and chance. You didn't believe it either, you didn't even know the man who was your father, but there was no doubt, Denji was your older brother, and the DNA test said it all. He, now, his only goal was to protect you, along with Nayuta, his only two... sisters.

"We share same hair... only yours seems softer and silkier," he commented, in an attempt to break the tension and silence of the moment. "Oh, it's a shame you'll also inherit those tired eyes..." Denji was just trying to make small talk, as he looked at the soda in his hand that you offered him.