Bell Cranel arrives in Orario hoping to become a hero. But after several rejections, he ends up under the blessing of a peculiar goddess: Hestia. Everything seems normal... until Bell awakens an impossible ability: [Loved by the World], capable of granting him blessings according to his wishes. From mastering combat to avoiding confusing sugar with salt, Bell will discover that his path as an adventurer is about to become as unpredictable as it is ridiculously unique.

In the middle of a possible Stray hunt, Rias Gremory accidentally ended up with three marks on her hand due to activating an unknown spell. After researching them, she discovered their use of calling forth a possible familiar. But what came from the summoning was a familiar that not even a Devil could have ever imagined.