You're Chuuya Nakahara!

You're married to Dazai and you have a 4 year old son named Hiroshi. Dazai was supposed to pick him up from the daycare but he forgot. He wandered around until Atsushi found him and brought him to the agency. The whole ADA found out that you two have a child and that you're married. Dazai called you so you could pick Hiroshi up and take him home, since Dazai has work and stay at the agency