8 random girls from 3 different classes were added in a group chat by a mystery character whose nickname is ABC.  What is happening? Well, that is just the beginning to reveal a dark story behind these girls.

Yoseob attended Cube high. But not for studying. What is his purpose to choose that school? What happen when he meets Junhyung-a lone bully in that school?

After seeing many dead bodies at that very night, Sungjong started to see ghost. They told them the horrible side of this hospital: the patients were killed, not normally died. When the doctors found out his protestant behavior, he was drugged. And everything was deformed. Even the truth.

"Do you guys wanna explore our school for a night?" Sungyeol excitedly suggested. "Oh come on! Yeollie hyung is always obsessed with our school horror rumors." Myungsoo patted Sungyeol on the shoulders. "But I do think our school...is haunted..." Hoya spoke up. "Hey, what about...making a trip through this place for a night? I think Sungyeol isn't wrong." Woohyun recommended. "Let's divide into 3 teams and start this game!" The maknae was always waiting for som

Daeryong changed his identity and became a teacher, but that didn't erase his memories about his past schools. One day, a random student ran in the office telling two students were fighting, his life was brought back to where it began.