The Maid's Devoted Phantom DukeDān Liàn Zhèng De Gōngjué Dàrén ; El Duque no Correspondido ; The Lithromantic Duke ; The Maid's Devoted Phantom Duke ; The Unrequited Duke ; 单恋症的公爵大人 ; 幽霊公爵様はメイド長にご執心