High school student Kanade Amakusa suffers from a curse called "Absolute Choice,” which requires him to select an action from a list of options that appear before him at random. Unfortunately, Amakusa’s choices are limited to the weird and perverse, causing him to become something of a social outcast at school. But when a sudden choice on the way home from school causes a beautiful girl to fall out of the sky, Amakusa might’ve found the key to break his curse for good!

Following her graduation from middle school, Yuzuhara Konomi enters the same high school as Kouno Takaaki, her childhood friend. As the new school year begins, they meet their childhood friend Kousaka Tamaki, as well as many new acquaintances. Unbeknownst to the group, their encounters with each other will soon lead to many memorable adventures.