Senbei Norimaki, an inventor, finally invents his dream robot, the House Keeper Robot -Arale! But somehow the House Keeper Robot becomes a girl robot who has super powers!
Midori gains too much weight, so she starts a diet! On the next day, she scales her weight again, and she gets a huge shock because her weight goes up again! So, Senbei takes her to the hospital, and they find out that she is pregnant!!!
