The problem of insufficient counseling service among high schools augments students need for peer mental support. The present study utilized quantitative and qualitative research methods to explore how applying peer counseling using counselors experiences about challenges and future directions results in Chinese junior high school students shift in Sense of Purpose and Achievement Motivation by analyzing 173 questionnaire results and coding 10 interviewees records. The findings suggest the following: 1) story-focused peer counseling has the potential to improve students Sense of Purpose and Achievement Motivation; 2) perceiving peer counselors as role models helps students internalize and apply the insight gained from counselors disclosure to their real-life situations; 3) self-projection influences how students leverage peer counselors stories to address the academic challenges they face. Overall, this study contributes to understanding the effect of self-disclosure stories on peer counseling and provides practical implications for organizing peer counseling among high school students.