Middle schooler Kon and his landlord, Kasane, live in a world where periodic exceptional phenomena, more commonly known as bugs, are part of everyday life. They range from troublesome to inconsequential, with building interiors turning into elaborate labyrinths or stripes appearing on water fleas—whatever the case may be, Kon is quickly learning to roll with and even enjoy each new occurrence as it comes. To Kasane, however, Kon’s existence itself might be the most wondrous marvel of all…