Simple secret love, simple story "Underworld" is a story about secret love in high school. Ordinary little tricks can make the other person tempted. Remember, teenagers are not simple, and people who have a crush on teenagers will not be willing to simply end the crush. For Coco, "You are the boy you like, and vice versa." Their every move will attract each other's attention, not because of anything else, but because they like it.
Concept: The secret love in high school will not simply end. It is a story that will happen in the dark.