100 DAYS to prove mom that I have my man here on Seoul. 100 DAYS to prove them there is someone who I deserve for my life to stay kept forever. 100 DAYS to let them know what their daughter can see 100 DAYS to let him fall for me.. \\\\\\\\\\\\\ 1OO days is a series about JIN and a Girl named HEUNJI. Read the book to find out how will she let him fall for her!!