Two Situations That The Phrase “Locked-Room” Can Be Applied In

"Yes, this is a pocket dimension."

This was the fifth time the pocket dimension said that. 

No matter how many times she asked, whether it was a subtle or a direct attempt, she would receive the same answer every time. 

She looked at Ryuji who was standing outside the warehouse. His shoulders were slumped and his head was held low while his face had taken on a gloomy expression as he mumbled something under his breath, "How is this happening? Could I have remembered it wrongly? But, but I don't remember reading this pocket dimension in the Mokugyo Forum."

He seemed unable to keep his emotions in check and would always slip into a "everything has been done for" mindset not long after that. 

"Well, no matter if it's a pocket dimension or not, just don't come near. I don't want you to be trapped inside as well."