actually the concept of philza being the type of immortal where he does die but then he comes back, so when he dies he gets to see Kristen his beloved, but Kristen will refuse to talk to him if he kills himself on purpose to see her, because she literally only made him immortal because she hated the idea of him dying forever why would you make yourself die on purpose its not allowed
and the vampire trio being the type of vampire that can eat human food if they wish, so long as they have blood running through their bodies to make it function and ingest the food properly
the trio of vampires have met philza before in casual settings, maybe its the middle of the night in a cafe and notices them sitting tiredly in a booth, and he buys them some pastries and hot cocoas because they look tired and he sits with them for a bit.
they have a fun enough time that they come back the next night to try and see him again, and so does phil. they continue to meet each-other for a week
but one night they come along to an alley near the cafe and see philza getting mugged, he gets stabbed before they can intervene and then dies and comes back completely unaffected
see, technoblade and wilbur have no problem draining people and killing them to survive, its inconvenient sure but they'll do it with no moral qualms
but tommy hates it, so he usually only drinks enough blood to make the human maybe pass out and then stops and leaves them
the problem with that is it creates a visible trail of victims and witnesses for vampire hunters to follow and track them down, because tommy has to drain 2 people instead of just one
so twins duo kidnap philza in the name of getting some peace and quiet from hunters. in their mind, Philza is a nice enough guy not to be too annoying to keep around, tommy already likes him, and he didnt seem too phased about dying.
unfortunately, they only thought this would work because they don't understand morals.
surprisingly after being pissed for a little while, philza turns relatively calm about the whole thing after he realizes theyre vampires and they just need him for blood, in his mind, theyre not being unreasonable they just want to protect tommy and themselves, and eventually he can probably convince them to let him go, he has all the time in the world to do that
this is a human man whom he liked, who he thought his brothers liked too! and they kidnapped him! theyre trying to force tommy to kill him!
and tommy wasnt even there when phil came back to life in front of twins duo, so he thinks theyre lying and that they think hes stupid enough to fall for that
phil even tries to convince tommy at some point when tommy starts to look like he really needs blood, that like, he really will come back even if he does drain and kill him, but tommy thinks philza has been hypnotized to say that by wilbur, and the wording of it makes tommy so upset that he stops visiting the room philza is being kept in
all this to say that eventually philza is granted access to the rest of the house out of wilbur and techno's sheer guilt at how willingly philza has gone along with all this, and how long its been that phil has just been stuck in one room
and then philza does the most unhinged thing possible and asks them to kill him in front of tommy.