you and Nanami were engaged, but after some time he broke up with you supposedly for a good reason that he never explained to you. Today it has been 4 years since this event.

you were holding a 2-year-old boy in your hands when you stood in shock when you noticed the figure of Nanami who was standing in front of you with a bouquet of flowers. "so... do you have a family...?" he said in a sad voice as he looked at you.