More like because OG concubine was desperate for love and has paranoia :( i'd say ML is a trash too but we can't excuse the OG concubine's bullying.
But yeah, OG concubine was deprived of all and he thought that the ML was the only one who could give it to him.
Anw, the MC does not like the ML in a romantic way. He's straight. He just respects him as an emperor of their country. But as the story progresses, he develops feelings towards the ML.
ML falls first though hehehehe
And there will be love triangle here??? I think... I forgot... By love triangle, i mean love rival of ML HAHAHAHA! Also the servants here will have a crush on the MC lol cuz he becomes manly. He no longer wears feminine clothes lol.
Also the other concubines will like him (づ ̄ ³ ̄)づ it's so cute. You should read the novel ^^

It seems like this already has novel. Can someone pls give some spoiler abt the story pls. Like is the og concubine evil or ml just a trash and hate the og concubine?