Because she has been putting on a little weight, Manabe decides to go on a diet. The net criminal brothers Mac and Harry unjustly resent Manabe who is on the look out for them, causing them to lead a life of escape. The two use Asteroid Gravityman's power to manipulate the scale Manabe uses to make her think she is overweight and causes her to diet constantly. Their small-minded scheme is to weaken her through these means to get back. Meanwhile, Netto and co. have been assigned to virus checking a submarine in the deep sea. - Heat Man