Kousaka Kaito, who is afraid of regret and unable to try even the smallest things, secretly harbors feelings for Kurokawa Rin, a classmate who is honest about what she wants to do. He wants to talk to her, but he doesn't want to fail and regret it… Then, a strange app called “Spoiler Life”, which “spoils your life's regrets”, appears on Kaito's smartphone…!? **Award:** Grand Prize in the 31st KADOKAWA Manga Newcomer Awards