Moroboshi Ataru

The protagonist of this story.

Ataru is a 17-year-old student at Tomobiki High School, Class 2-4. He chases after and tries to grope every woman no matter what the situation, except his "wife", Lum. However, it is revealed on several occasions that she is the only one he actually loves. Despite this, he typically treats her like a nuisance and constantly disobeys her.

Born in April (4, an unlucky number in Japanese culture) on Friday the 13th, Butsumetsu, and the same day as a major earthquake, Cherry has referred to him as a carrier of bad luck rarely seen in this society.

Ataru has occasionally let his good-natured side shine through, most notably when he took care of the class caterpillar everyone else hated and when he went on a date with the ghost of a sick girl who had admired him from afar.