Haruto is given a second chance at life, only to be abandoned at birth.

The border province Haruto calls home has been plagued by thieves. Haruto tries to investigate in secret, only to end up arousing suspicion from his sister Charlotte. But all of that is about to change when the thieves go after Charlotte herself!

Haruto is suddenly faced with Charlotte's constant affection, which he finds a welcome change, albeit one that will take some getting used to. But what Haruto finds more troubling is Charlotte's new burgeoning obsession... with Japanese anime?!

Haruto continues to fight villains by night in costume for Charlotte's entertainment. One night, he stumbles upon a group of magicians, but he soon finds that their presence is just the beginning of a much greater, darker conspiracy...

Haruto, in the guise of the Black Knight, appears before the queen in her chamber, determined to put an end to her schemes. But Queen Gizelotte proves to be more powerful than anyone Haruto has faced before, with a secret weapon up her sleeve...

Haruto is on the hunt for an attendant to take with him to the royal capital when he starts attending school, but no one around him seems cut out for the job. However, an unexpected encounter might be just the answer to Haruto's problems!