Nobita hatches a 22nd century egg and out comes a small typhoon, which he treats as a pet. Then Japan suffers a major typhoon which is heading towards their house which has a loose roof and the little typhoon goes out to try and stop it.
To avoid getting hit by Gian, Nobita uses a shower which makes it look like he is several feet away from his actual position, which allows him to kick Gian without retaliation.
Nobita who was born on August 7 checks his astrology in a comic and thinks he is due a good week. Doraemon gives him a small mechanical bug which if you predict something, it can come true. The problem is that Nobita is a pessimist who thinks the worst, and it was last week's comic he was using.