After the shocking death of one of his pupils, Choi Chung-ji begins the Echo Association to benefit highschool students studying under financial hardships.
Cheongchun gonghwaguk (1977) Online
After the shocking death of one of his pupils, Choi Chung-ji begins the Echo Association to benefit highschool students studying under financial hardships.
| Cast overview: | |||
 | Jeong-kil Lee | ||
| Yu-jeong Han | ||
| Hyo-won Kim |