The alien creature Holloway is an advanced AI robot that originally had no emotions or desires. Due to a breakthrough in scientific research, the owner Doctor Wu developed a new type of "regret medicine". In order to test the efficacy of this medicine, he actually tested it on himself. Unexpectedly, after taking the medicine, he began to regret making Holloway, because it had developed its own will during the long-term experiment of assisting Doctor Wu. When Holloway realized that its owner wanted to destroy it, it chose to save itself, stole the "regret medicine" and escaped to Blue Star. Here, it encounters creatures that are completely different from itself. They always regret their past actions and think that another choice will bring a better situation. Holloway doesn't understand them. In order to find out the reason, it sells "regret medicine" to those who need it in exchange for benefits. What kind of story will happen between these people and Holloway?
Concept: When an AI robot experiences the five flavors of the world, what enlightenment will it bring to us?