Everyone experiences trials and errors as one lives on one’s life. Those trials and errors become one of the memories of embarrassing moments. Despite one’s strong resolution to not do it again, it happens again. Just like we used to make review notes to find the correct answer, we might be able to get a brighter future through embarrassing moments. A math teacher gets chosen as an exam writer for College Scholastic Ability Test and attends a training camp. Between her first love and her ex-husband, she makes an amusing and sweet journey to try to find her own answer.