Kantai plot
"Welcome to our house."
Somewhere in a corner of central Tokyo, Kobayashi lives with his young wife, his daughter from a previous marriage and his divorced sister. The only recent notable event in this hardworking and industrious family is the disappearance of their parakeet, Pi-chan. One day, Kagawa appears, claiming to be the son of a wealthy family that once provided financial support to Kobayashi. Kagawa moves in with the family and the life of the Kobayashis slowly but surely begins to change under the influence of Kagawa and the visitors he brings with him.