Horror comics author Junji Ito has recently purchased a new house and has decided to invite his girlfriend to move in with him. However, when she moves in, she comes with two cats, Yon, a strange-looking white cat with a ghastly fur pattern on its back that resembles a skull, and Mu, Yon's cute counterpart and playmate. This manga is a diary of the author's life as he tries and often fails to connect with his two feline friends. The manga is drawn in Junji Ito's horror comic style featuring intricate and finely drawn images.