At first glance, the family of Kinomiya Aya may seem quite ordinary: loving mother and father and a kind elder brother, however, appearances can be deceiving—Aya's father constantly beats her mother, scolds them for the slightest "transgressions," and commits other inappropriate deeds. Her brother spends all of his time selfishly ignoring what's right in front of him in favour of enjoying himself. Her mother is enduring it all for her children, and both mother and daughter live in constant fear of Aya's father. Because of all this, Aya envies ordinary families and the children who enjoy them.

One day, after witnessing a quarrel between father and mother turn violent, Aya experiences a great deal of stress, due to which she gains the ability to turn invisible. At first, the girl indulged in her superpowers, but eventually she makes a decision that will probably make her blame herself for the rest of her life...