Shana oh YoshitsuneShanaou; Shanaou Yoshitsune; ชานาโอ ขุนศึกสะท้านปฐพี; 俠義少年王; 遮那王義経

From DragonVoice: This is naturally a shounen manga and deals with the orphaned boy Hyouta who's in a group of traveling entertainers and one day he encounters a fine noble woman named Tokiwa who requests the group to perform at her home. But her intentions are not what they seem to be... Read the rest for yourself ^^ The first chapter will probably remind you guys of the story of "The Prince and the Pauper".