Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.
Shin-chan, the boy next door, is a walking disaster, creating chaos wherever he goes. With the body of a child and the mind of an adult, Shinchan is wreaking more havoc than any child before. Shin-chan is carefree, optimistic and gets excited about everything. This 5 year-old likes to do things his way.
