South Korean boy band BTS wishes all high school students' good luck for their annual college entrance test. The College Scholastic Ability Test or CSAT is an annual standardized test in South Korea which will determine the university a student will enter.

On Wednesday, the seven-membered boy group took the "V" app their words of encouragement to the students who have been working hard to prepare for the exam, KpopHerald reported. The CSAT commenced the following day.

BTS also reminded the students to not forget anything and not to be nervous. We can recall that the group shared a similar video last year.

Abbreviated as Suneung in Korea, it is described as "the chance to make or break one's future" of the students taking the test. About 20 percent are re-takers of the said test.

On the test day, stock markets opens late and buses and subways are increased to avoid traffic jams that could prevent students from getting to testing sites on time. Planes are also grounded to avoid noise disturbances.

And in some cases, students are escorted by police officers. CSAT has been praised for its effectiveness, meritocratic factors, and high international results.

Meanwhile, BTS has once again reclaimed their number one spot on Billboard Social 50 chart. Billboard Social 50 is a popularity chart which ranks the most active musical artists on the world's leading social networking sites.

The group knocked down last week's No. 1 Ariana Grande down to the second spot. Followed by Shawn Mendes, Rihanna, and Justin Bieber on the third through the fifth spot, respectively.

Ever since the group's comeback last month with their album "WINGS," BTS has been continuously lighting up the social media circles everywhere in the world. Recently, their album's lead single "Blood Sweat & Tears" reached a 50 million views on YouTube.

Catch BTS in their WINGS short film "Begin" below: