There is a category called a colleague aside from a friend.
Treatment is the same with friends, is displayed on another page, with a distinction between friends.
How to become a colleague, and how to become a colleague is different.
View the page of colleague, and copy the portion of the sub-domain URL, navigate to your home to sign in to hitois, click the "Colleague" on the menu, view the page of colleague, and then click the "+Add". Input field will be displayed sub-domains, and saved the copy and paste the sub domain, you can become a colleague.
Sub-domain is the part before the hitois.net. For example, in the case of http://family.hitois.net, "family" is the sub-domain.