Contains spoiler (⊙…⊙ )
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And I'm just gonna leave this small detail about the background or personality of each concubine (not actually mine just happen to found it but hope this helps)
1st ML was the first one to find out that the MC had no memories(??). He’s good and obedient. He was a slave and became a concubine to the original owner of MC, so he has no power.
2nd ML is a intelligent character that loved the original owner of MC. He is a librarian , but it was a character with poison on its side because it didn't give love. Later, he fell in love with MC and became a concubine.
3rd ML is ambiguous. A prince of a ruined country who tried to escape. Has a great hatred to the original owner of MC, because original owner of MC destroyed his country to get him.
4th ML is a highly loyal concubine. seems to be concubine with loyalty to the royal family rather than love. He's a blunt man who doesn't know what he's thinking. But this guy is also falls in love with MC.
5th ML is a tsundere. He’s a commoner and has great swordsmanship. Despised the original owner of MC but fell in love with MC.
SHARE SOME SAUCE PLS! Σ(っ°Д °;)っ