So for ch. 72 nothing really happened it was just the aftermath of the two noblemen killing each other and I think seme is considering it as a planned or something (i might be wrong considering im just using an app translator). Well anyways we also see uke bathing seme and exchanging convo (nothing really major)
Ch. 73 however, we see uke put poison in seme's liquor (omg). And then the servant was left alone at the uke's room and almost drank the poisoned liquor which the uke snatched away and became angry and asked if he drank it. He said no but as he was leaving the room he remembered the conversation with exml (im bad at names sorry) asking him if there's anything wrong with uke blah blah blah and i think he starts to get suspicious idk. At the end we see uke entering seme's room and offering him the poisoned liquor. I think seme refused at first for some reason and i think uke said he also wanted to try the liquor??? (might be wrong) but he eventually agreed and the last panel is seme drinking the liquor