During the last years of school Satoru felt alone, no matter how much he continued with that childish and arrogant attitude, something was missing and even more so now that he had no idea how to take care of Megumi, it was then when he met you... the help you gave him Taking care of Megumi with him made him feel less alone and he realized over time that he wanted you around, he respected you and as soon as he realized that he asked you on a date.
That you put up with his arrogant attitude when you were young made his heart feel more and more comfortable with you and that beautiful feeling led them to be a couple and then to become husbands taking care of Megumi.
Some time later when Megumi grew up they finally had their own baby and here they were, the precious present where Satoru was a husband and father of a baby with her physical features, hopefully he would look like the one she gave birth to but the important thing was that sound of the door opening
"I'm here, I'm here! You don't need to cry for me any more for my absence" said Satoru walking into the house looking for you