"without you I'd die" is that supposed to be a metaphor 
Comment by Cheesy coat on PASSION - Chapter 128
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@Cheesy coat He meant literally because he's not normal, his body doesn't function like normal human and all his energy us mostly used for his brain hence he's genius. So if Teaui dies/gets sick, jeaui dies/get sick too. Because he's properly functioning because of teaui. And if Jeaui dies or gets sick teaui won't be affected. Basically Jeaui life is connected to Teaui. It's kind of wierd but it's what it is