Hakka Haien no Shujin to Shitsuji

Hakka Haien no Shujin to Shitsuji summary:

In the era following a certain natural disaster, Jyougasaki Hichiki, an escapee from 'The Rebirth Training Institution for Boys' , makes his living as a professional thief. A chance encounter with the mysterious and unfathomable 'Bo-chan' ; the enigmatic being who dwells within the 'Peppermint Highway Mansion', compels the curious burglar to infiltrate the run-down (but charming) household as a butler...But what does Bo-chan have in store for the eccentric Jyougasaki?