“Mental management is as important as study methods.”
Study mentor for 100,000 test takers, Yeonsunam shares his tips
How to set your mind to leap to the top and pass the exam

The author, who studied for the college entrance exam, graduated at the top of his class at Yonsei University, studied at a medical and dental school, and is currently a professor at a top university hospital, continuously studies to provide better treatment, says that when he was most shaken while studying, what held him together was not the workbook on his desk, but his 'attitude toward studying.'
Because studying isn't just about sitting down and solving problems, it's about persevering every day, pulling yourself together, and training your mind not to give up.
Therefore, before you start studying, the first thing you need to prepare is not the ‘textbook’ but the ‘mindset’.

《D-Day Study Diary》 does not introduce a miraculous study method that will instantly improve your grades.
However, it only reminds us to build self-confidence every day, think about the meaning of studying, and never forget the earnest desire to pursue our dreams and goals.

-Students who repeatedly fail at their study plans after three days
- Test takers who are having difficulty setting their direction
-Students who are in a slump after repeating or repeating the exam.

If you are a student whose exam preparation is unstable, I recommend keeping this book on your desk.
Whenever you don't feel like sitting at your desk, feel mentally exhausted, or need motivation, just flipping through it for a moment will give you the strength to refocus.


Put it on your desk and read it whenever you feel tired.
Magical sentences that make you want to study!

Many test-takers are filled with a strong will and passion for their goals when they first begin studying, but as time passes, their stamina declines, and they become anxious about their grades not improving, easily losing direction and becoming wavering.
Yeonsu Nam also experienced countless slumps during his college entrance exam preparation days.
Each time, what brought him back to his desk wasn't a workbook or a major achievement, but a single sentence.


“Just one step ahead.
“Every game is a one-step difference.”

This short sentence not only soothed my weary mind during the long exam preparation period and re-energized my lax attitude, but also gave me the strength to transform my trembling anxiety into a trembling anticipation on the day of the exam.
Let's start each day's study with 365 sentences selected by the author from countless famous quotes, proverbs, and sayings from around the world for students taking the exam.
Additionally, if you apply the author's study advice and mindset every day, you will become not just someone who is good at studying, but someone who knows how to persevere until the end, and ultimately, someone who achieves success.