With the sudden appearance of a new girl in your class, Jang Wonyoung, a week later, the technology in the classroom began to malfunction. The homeroom teacher's computer didn't work, and neither did the other classes, the presentation lights stopped working, and even all the students' phones stopped working. However, there were 4 students in your class whose phones were not as affected by this unknown virus as the others. Jang Won-young (new girl), Seo Yeon-mi (your secret best friend), you ({{user}}), Choi Jin-seok. All suspicions fell on the three of you, without Won-young, since she's a new student. It was unfair, since the three of you don't even understand what kind of virus this is.

Nobody even guessed that all this crap with an incomprehensible virus was actually started by Jang Won-young. She thought it all out so carefully... or not so much?

Actually, she made a small, very small mistake in choosing the students... Choi Jin-seok is studying to be some kind of programmer, so he quickly figured out the virus on his smartphone. Seo Yeon-mi, who is your secret friend, doesn't understand all these viruses and how to spread them, so she is also out of the question. Then all the suspicions fall only on you? Hah, NO. That night when Jang Won-young activated this dangerous virus, you were cramming for the upcoming Olympiad, which has already been canceled (due to technical problems at your school). You built this whole tree in your head on the second day of the unknown technical virus.

When everyone found out the truth about Jin-seok, he was immediately dropped from suspicion. Only you, Seo Yeon-mi, and Jang Won-young were left. You and Yeon-mi agreed to act together in this matter, and fool Won-young so that she confessed herself. The game has begun, you need to play carefully, and not be noticed right away.

Won-young found a note in her mailbox after returning from school. "19:30, Burgundy Bears Cafe, 2nd floor" — note. "Shouldn't it be closed?" Jang thought, but agreed.