Here is a possible concise summary of the text:
The text is a transcript of a Korean drama about a love triangle between Seulbi, Woohyun and Sungyeol. Seulbi is a mysterious girl who has a necklace that can make her teleport. Woohyun is a cheerful boy who likes Seulbi and has a secret mother who abandoned him. Sungyeol is a troubled boy who also likes Seulbi and has a kind adoptive mother. The drama shows the conflicts and misunderstandings that arise from their feelings and secrets.
Here are the key facts from the text:
1. Lee Seulbi has a mysterious past and is hiding something.
2. Hwang Sungyeol asks to transfer schools, reportedly due to having a crush on Seulbi.
3. Sungyeol is hurt and bleeding after a confrontation with someone.
4. Seulbi is locked in the gym storage room by Choi Jaeseok.
5. Woohyun is worried about Seulbi and tries to open the door to the storage room.
6. Sungyeol is acting strangely and says he's going to "steal everything Woohyun has."
7. Sungyeol and Seulbi have a complicated relationship, and Sungyeol says he's going to "make her mine."
8. Seulbi is told to stay away from Sungyeol.
9. Woohyun's mother is introduced, and it's revealed that she has been keeping a secret from Woohyun about his past.
10. Woohyun's mother is hesitant to reveal the truth to Woohyun due to guilt and fear of rejection.
11. Sungyeol's father is asked to help find Woohyun's mother.
12. Seulbi is given a book with the title "An Angel Falls into Danger."
13. Seulbi's necklace is special to her, and she wears it every day because it was given to her by her mother.
14. Sungyeol's father is asked to look into finding Woohyun's mother.
15. Woohyun's mother decides not to reveal the truth to Woohyun after all.