Help me find the manhwa name because my ass can’t remember and didn’t save in my lists

Hi guys please I’m begging for someone that knows this manhwa. I know this exist ‘cause there’s the runaway uke plot that I really like (but the beginning plot is like really digusting)

I remember that the story goes like this. This is in a military academy setting I believe. Uke looks up to the seme because he’s like the commander of the force and very charming & strong. One day, he was called in his office for something but ldhk, he’s there for filthy things hence the digusting beginninv plot. (I’m not entirely sure if my memory is correct for that tho :>)

Fast forward to the chasing sequence, like I remembered they are doing some operations in a mansion? And the uke betrayed the seme like I think he was holding a rifle/shotgun? MY MEMORY IS SO FUZZY FOR THIS. But I am sure for this next part. The uke successful escaped right? He’s like in this remote town and here he received a news that his sister is getting married to the seme. He did this spy thing to go to his sister to talk about the marriage. I don’t remember what the specifics however, the wedding came and the uke went there. Little did he know, it was a scheme by the seme and the uke’s sister so that uke would come and sit on the trap. The marriage still went on but the sister was married to some dude that she knew after escaping their estate. OH AS I WAS WRITING THIS I JUST REMEMBERED. The uke has a sister and a brother but that brother died (i don’t remember how tho) and the sister escaped bcz. there’s some family drama that involves killing i suppose.

So that’s it. I would really appreciate if someone could comment the right manhwa name as I’m very desperate to reread its angst. Thanks in advance guys <3