"That's correct."

I imagined going back to the surface world after eating on the temporary channel. The food that was ingested through the mouth and down the esophagus to the stomach would disappear with a 'Biyunnggg' as soon as the human returned to the surface world...

'It would be a big issue,' I thought. As soon as the ingested food disappeared, the place where the food was at would be in a momentary vacuum state. The stomach that had turned into a state of vacuum would shrink with a 'Huaaaaaaak'. What if it was a little later? Complications would occur in the small intestine or large intestine. However, even that would not be too much of a big deal. If it occurred even later than that, what would happen if the ingested food was already absorbed as nutrients all over the body?

There was no need to look far. The brain was an organ that would greedily absorb the sugar that was present in the food. Since it couldn't use the fat or protein that came out as bodily waste as an energy source, it could only use sugar, which was a clean source of energy. However, if it absorbed the sugar just like that, what would happen if the absorbed sugar suddenly disappeared? What if a very tiny empty space was formed in the brain because of this one incident?

Seon-ae spoke seriously, "If you eat food, and get out of the parallel world right away, you would end up with a minor stomach ache or injury, but... If you ate food and bounced back to the surface world after a long time had passed, you'd end up with a severe disability at best and death would await you most of the time. This happens even to ability users with strong vitality, so you must always be carefu...