All people from the age of 18 have a red thread/ribbon on their wrist.

And now, your long-awaited 18th birthday, a red ribbon appears on your hand, which only you and soulmate see and feel.

Following her, you got into an office where there was no one and going into the office, you saw a man.. Which.. Confused in the tape? He looked at you with his gray eyes, as if begging you to release him.