It never goes full serious, it goes crazily deep. Treat it like you would Alice in Wonderland - not serious per-say, but good at whatever it is doing. There’s a lot of conflicting emotions going on through the VN.
I think you’ll find that they are Alpacas, not Llamas. Paca plus, Sekai has it coming out on Steam.
I haven’t read it yet, but it’s either going to be stupid, or pretty good. I can imagine a really good story coming out of it, but I don’t know if the authors take themselves seriously.