★- You live in a world where people possess red threads that are connected to their soulmates. They remain hidden to everyone except you.

Your parents have moved to a new city, leading to you having to go to a new school.

When you enter your new classroom, you see a boy without a string.. Diluc. This is something you've never seen before. Despite threads being able to form newly later in life, he didn't even have an approach to a string.