Ey bro the message actually got to the mangaka and he made the guy not as relevant on the future chapters. It gets better despite this irritating very brief 'arc' from that dude.
Okay complete theory....i believe there's somewhat like a "coalition" of women predators around their area. And the main area for their modus is that apartment. Heck i even theorize that the old woman teacher knows about it as well.
What is this soy-slop manga? Fem-dom is one thing, but this pathetic shit is another.
Don't be prisoners of your past my brothers, we're all gonna make it bruv.
If he really doesnt want to die for betraying the protag, couldnt he just NOT betray him the moment they get to that part of the game? Theres this obvious plot hole this manga is not addressing.
Jesus...who's to say the puppet would act like a good girlfriend for you?....man he's so desperate for a companion, which is understandable after what he's been through.