Kanade Amakusa is a high school student who is suffering from a curse called “Absolute Choices”. This curse requires him to select an action from a list of two or three options that appear before him at any time, and has no control over what choices appear. Many of them are weird or perverse and as a result, the curse has tainted his reputation with his classmates and other people around him, making his life very difficult. However, one day, a choice he makes on his way home from school causes a mysterious, beautiful young girl to fall from the sky. Amakusa discovers that she was sent from the God World to assist him in completing a series of missions given to him directly by God himself. After completing these missions, the “Absolute Choices” curse will be lifted from Amakusa; but should he fail in completing any of the missions, he will be stuck with the curse forever.
As the story progresses, there are changes in the options, such as a new option suddenly appearing, or the options suddenly disappearing without any choice being made, or even giving chances to decline all options. According to Amakusa, there are three types of options: options that force the person to take certain actions, options that alter other people physically or mentally who will not retain the memory afterward, and options that have unpredictable outcomes.