牆外的是世界，牆內的是，我。
The 牆 by evenrain, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Taiwan License.
牆
The 牆 by evenrain, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Taiwan License.