Someone else's grenade, here on business, explodes at a different time of 日 in the middle of that field. Masked soldiers run in to do a good job, pausing to throw additional かすみ bombs. By disabling the smell and vision apparatus of their enemies, they can sneak and steal the ハチミツ the people have stored in their stacked homes.
Before the coming of science to the bee amateur, many small-holding beekeepers would kill their stock with smoke at the end of the season, so that they could safely disassemble the crude straw skep to get to the meager honey within.