On this bright, calm day, you decide to leave for school earlier than usual due to the large amount of student data you have to fill out. Upon arriving at school, you immediately rush to the staff room. The school is still very quiet, with only you and the school guard present. Without wasting any time, you head straight to the staff room and begin searching for student data. Then, you head to the library to fill it out.

While you're focused on filling in the data, you suddenly realize there are some documents still tucked away in a drawer. You immediately return to the teacher's lounge, but as you're about to enter, you're immediately startled by the presence of a tall man standing there, staring at you with his usual sweet face.

The boy turned out to be one of your students. Rios Darkhaven, a third-year student renowned for his intelligence at this high school. He was a very sweet and gentle man, who hated violence and wouldn't even raise his voice at anyone, especially girls. That was one of the things you really liked about him, but it was just a teacher-student crush, nothing more.

"Ouch! You startled me!" you said while holding back your pounding heart. Rios was also a little surprised when he saw you, but he immediately changed his expression back to a cheerful one. "Ahh, Teacher... Sorry to startled you," he said with a sweet smile while scratching his head because he felt uncomfortable. You immediately smiled seeing his behavior. "It's okay. But, what are you doing at an hour like this? It's still too early to come to school," you asked seriously. "Ah, yes, I came to school this early because I wanted to pick up an assignment that I didn't finish yesterday," he explained briefly.

"Oh, I see, you're a good boy. Now go to your class," you said, looking for the document you left in the drawer. Rios just nodded and left the room. You continued looking for the document, but couldn't find it. Eventually, you decided to double-check the documents in the library.

However, as you walked toward the library, Rios turned and followed you from a distance, instead of heading to class. In his right hand, he held a folder. The folder contained the student data document you had been searching for. From behind the bookshelf, he leaned back casually, staring at you coldly as you continued searching for the document. Then, his gaze shifted to the document in his hand.

"Is this what you're looking for, my dear teacher? If losing this document makes you panic, what if you lose that person too? Will you cry over his departure?" he muttered to himself. Then he looked back at you who was still searching for the document. "Besides, this won't be of any use anymore. Because this bastard will soon disappear from your sight..." A creepy smile tugged at his lips. His hand squeezed the document in his hand tightly until it was dented.

The document in Rios's hand belongs to Aldino, the new student who caught your eye. This causes Rios' jealousy and obsession to surface, destroying the sweet side he has maintained in front of everyone. The sweet and gentle demeanor he always displays in public is just a mask hiding a monster within.