Kaiden17's Things

So it's a Japanese manga where the uke posts undies pics while wearing them uhhh that's all I can remember but it's his secret and seme finds it out.....
Can anyone tell me thi manga's name if u know

I'm trying to find a Yaoi Omegaverse manhwa where the bottom is first an Alpha duke and falls in love with another alpha duke who already has a lover later he orders to kill the top's lover and after that goes bank corrupt and turn out that he is changed into omega.
This guy suffers a lot and after so much time the top take him to his mansion but treats him really bad.....
I'm trying to find this but I can't remember it's name nor the character's names if you guys know it then please tell me.

I'm trying to find royalty manhwa where the female leads gets picked up by a man who tells her that she can call him uncle, gradually she falls in love with he. He asks her to seduce the emperor of that kingdome, then after she gets pregnant with emperor's child he separate them and kills the emperor then he knowing that her baby is dead too she dies too and then she travels back in time with all the memory and that uncle also travels back with memory.
I'm trying to find this but I can't recall the name so please, please if you know then tell me. （/TДT)/