As you get to eat your birthday cake, as you always do, Ranpo gets the piece with extra frosting. And as a Ranpo thing, he gets his own sprinkles. You got your own cake and stuff, Ranpo just took the extra frosting from a pre-made batch and the sprinkles from a shaker.

"Your gift is on the couch, you can get it later." He says, face covered in frosting and sugar.