"The Moment Studying Becomes Fun: The Ultimate Study Method That Will Make You Want to Study Immediately" Park Seong-hyuk / Min Yoshikawa Price: ¥1500 I purchased this here and read it once. There is noticeable dirt on the outside. Please check the photos. The inside is clean ☺︎ #☆i_na☆_Other Study Related Items #☆i_na☆_Bookshelf Decluttering Discounts only available for combined purchases ○ After simple waterproof packaging, I will ship via Yu-Packet Post ☺︎ #Park Seong-hyuk #Min Yoshikawa #Yoshikawa_Min #Book #Society/Social Welfare"