I believe some players do play multi account/ Helping friends for events BUT we all do finds that typing in username and password for differen account for signing in is annoying.
Here is the tricks may help you a bit on that - Google Chrome.
1) Download & Install
2) Open up Chrome Browser
3) Settings to Add New User ( You may tick create shortcut on desktop )
4) Visit Sexy Three Kingdom website (Add Favourite) for logging in and save Username with Password
5) Go to top left corner if you would like to login different account
You save a lot of time and steps for accessing different accounts now.
Hope it helps.
Server 9 Shy
Yes, We are Shy people lmao..