I took a look at the raws and it's only 10 chapters. The last chapter make me laugh ngl.
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I can't read Korean I only look at the pic so mostly just assumption.
The big bro has been kinda manipulating the lil bro (probably) and he indeed in love with lil bro for years. He also assaulted lil bro when he's asleep first before the lil bro even fuck him.
Well, guess they're perfect for each other.
What's with the Jii-san moving to hear things and the two wearing headphones
Is the parasite came inside via ears? Does the Jii-san using ears to seduce if what's he's eating is the parasite head?
Still so much to know.
But the woman with headphones use something like audio thing right?
What if the parasite not actually a parasite? What if they use sound?
Why the woman can see the balloon head? Is it because she keep using headphones and that block the sound coming in? Idk..
Just like you say, still so much to know.
Just found out this has English official release