Click the "Settings" button at the bottom right of the screen.
Since the advertisement will be displayed, cancel it with the ☓ button etc. after watching.

Press the "LINE authentication" button on the setting screen.
When the screen changes, press the "Sign in" button.

Log in with your LINE account.

Select the talk room to send the notification.
If you want to send it only to yourself, select "1-on-1 chat with LINE Notify".

If you scroll to the bottom of the screen, there is a button of "Agree and connect", so press it.
Return to the application setting screen. (At this time, if LINE Notify send you a message " "Notify Dog" is now connected.", LINE authentication is complete.)

When you are authenticated, the "LINE notify" switch will be appeared on the setting screen of the application, so turn it on.
If you return to the app with "OK" button, the LINE notification settings are complete.