Perhaps, we want to go back to our daily life. Though working from home has some advantages, some people like to work in their office just like they did in the past. Due to Corona, the Untact services are becoming popular rapidly now. In the past, employers didn't want to carry out 'wfh'. Now, however, most of them are accepting it. According to a MaeilGyeongje news report, yesterday, some office workers are now nostalgic for dinner after working. In the post-Corona era, maybe, companies will be more likely to use on-line system. We will have to prepare for on and off-line working system. But I think that 'wfh' has a lot of problems. In particular, employer and his employees have yet to facilitate muctual communication. He will be unwilling to continue to carry out 'wfh'.