Overjoyed by the appearance of an impossible game choice, the man selected it in his excitement. Before he knew it, he had been reborn as the infant form of the villain character, destined to be killed by the protagonist… and his sister was a child prodigy. In the game, she was treated so unfairly that players joked that she must have killed the developers’ parents. He vowed to make her happy. He intended to dedicate his life to this one goal! …Or so he had planned. However, his sister ended up obtaining a dragon egg that was supposed to be acquired by one of the heroines, and from that point on, a story he knew nothing about began to unfold