This is just part 1 of the story but I think it's nearing its end, tho I also think there's still a ton more rollercoaster ride to come, and author is really into story telling too so they might amp up the plot some more. My guess for this one is that uke will poison seme to weaken him since he knows the amount is not enough to kill him, and then when seme's weak, he'll stab him or something (referring to the dagger in the title) and then escape to attempt and kill himself but will be saved by someone. Of course both his attempt to kill seme and kill himself fail, and thus the plot thickens and drama ensues.
If anyone actually knows what happens for real next, let us know, pretty please! the tension is tensioning~