The blue exorsist and the red ghost hunter

meet Rin Okumura a 16 yr old crossdresser whoes tired of everything........ and wants to be herself and to embrace being a girl and her wayward past that brings us to Mai Taniyama a 15yr old who has no paper past and wants to embrace the ones she's left behind and include them in her future now add a crazy blood feud secret siblings in strange happenings will Rin and mai find your way out of this crazy spider web or will they stay lost

wait mai and Rin are sisters?