Science has not accurately explained consciousness so we really have no idea as to whether or not our bodies only serve as a set of peripherals for us to grow and experience into unending oblivion.
We know that consciousness and the brain are related because people with brain injuries experience a change in their consciousness. To expand what was previously said, if the hardware is destroyed, so is the software.
Just because metaphysics studies a concept it doesn't make it supernatural. Also, there's no proof that suggests that consciousness can remain after the death of the brain.
The burden of proof falls on OP who made this claim. And since there is currently no scientific evidence to lend credibility to the claim, this is just wild speculation.