짝사랑 관찰일기 (Translation: Secret Crush Diary) is a heartwarming mobile game developed by Day7. Available for free on the iPhone, this game takes players on a journey of unrequited love and teenage emotions.

In 짝사랑 관찰일기, players assume the role of a young protagonist who secretly admires someone special. Through a series of diary entries, players express their feelings and navigate the ups and downs of their crush. The game introduces four potential love interests, each with their own unique personalities and stories.

With its captivating storyline and charming characters, 짝사랑 관찰일기 offers a relatable experience for players of all ages. Whether you're reminiscing about your own past crushes or simply enjoy a heartwarming love story, this game is sure to tug at your heartstrings.