御城, お城: honorific form of 城 (shiro, “castle”)

後ろ: (now rare, dialectal, Iwate, Hachijō, Kansai, Shikoku, Izumo, etc.) Nonstandard form of 後ろ (ushiro, “back, behind, rear”).

back, behind, rear

honorific form of 城

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

to stand, to stand up, to rise / to depart / to close / of something physical but not solid or liquid: to be released, to rise

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(idol fandom) second favorite

押し: pushing / 押し: persuasion, especially in terms of romance / 推し: (idol fandom) being a devoted fan of …; … stan / 推し: (idol fandom) favorite idol