An ordinary notebook records the relationship between many people, but the notebook from childhood actually hides the secrets of another world. A teenager who is used to being alone unexpectedly gets a friend. How will he treat this friend?
As he learns more about her, he wants to see her in person more and more, and when he does, the detective hides her.
He also wants to have his opponent's friends.
I thought it was possessiveness, but I didn't expect it to be the softness hidden deep in my heart.
Concept: The secret is visible