Former relationship: "GIGANT" is an original comic work by Oku Haoya, as a sci-fi love theme work, which began to be serialized in 2017. Okuhiroya is a well-known Japanese manga artist.

【奥浩哉「GIGANT」（第03-04回）接触！！！】：

Chiho is on her way home after completing her work when she suddenly encounters the scene of a car accident. In the midst of the chaos, a mysterious man, with a vicissitudes of life and knowing that his time was running out, handed over a mysterious device to Chiho. The man's words are full of mystery, and he tells Chiho that the device can give her a special ability.

As the man delivered the device, he suddenly turned into a puppet and lay quietly on the side of the road. Chiho was dumbfounded, not knowing why. Subsequently, I found myself with the incredible ability to become bigger and smaller. This mysterious device seems to give Chiho a different kind of power, and she can switch between size and size freely. All this happening makes Chiho shocked and excited. She begins to explore this mysterious ability and discovers that she is able to adapt to a variety of environments in different sizes.