Haengunui Yeosin

Ji-Yun, who had always been second in her class, suddenly found herself in possession of a “lucky notebook.” While the notebook granted her the good fortune of becoming first in her class, it also completely disrupted her peaceful daily life. To focus on her studies, she must solve the strange problems it presents. Amidst all the chaos, love blossoms—even though it’s a romance Ji-Yun never asked for...!

(Source: Naver, translated)