Oniichan ni Natchatta
Minna no Uta ／ Minna no Uta: Oniichan ni Natchatta ／ Onii-chan ni Natchatta ／ おにいちゃんになっちゃった
Description
A little boy doesn't understand why all the women crowd around and pay attention to a baby. It's loud, cries, and doesn't do any tricks. Until he himself is called Oniichan does he realize that a baby is nice to have around to be given such a grand title of importance.