An ATEEZ x Monsta X FF - 𝗜𝘁'𝘀 𝘁𝗵𝗲 𝘆𝗲𝗮𝗿 2Ø43 and time travel exists. Yunho received a strange item by mail one day and becomes one of the five Holders who has 𝘁𝗵𝗲 𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝘁𝗼 𝘁𝘂𝗿𝗻 𝗯𝗮𝗰𝗸 𝘁𝗶𝗺𝗲. 𝗦𝗶𝘅 𝗺𝗼𝗻𝘁𝗵𝘀 𝗮𝗴𝗼 Seonghwa died an unfair death to the hands of a crazed man who barged into a restaurant with a gun. Now Yunho has a chance to save his best friend. Some might say it's a blessing, but only experienced Holders can truly understand the 𝗰𝗼𝗻𝘀𝗲𝗾𝘂𝗲𝗻𝗰𝗲𝘀 𝗼𝗳 𝘁𝗶𝗺𝗲 𝘁𝗿𝗮𝘃𝗲𝗹. Only they know the reality that there is no way to change 𝘄𝗵𝗮𝘁'𝘀 𝗱𝗲𝘀𝘁𝗶𝗻𝗲𝗱 𝘁𝗼 𝗵𝗮𝗽𝗽𝗲𝗻... ...not unless they follow a rule left out from the 𝘐𝘵𝘦𝘮 𝘏𝘰𝘭𝘥𝘦𝘳'𝘴 𝘔𝘢𝘯𝘶𝘢𝘭. Will Yunho find out about the hidden rule and save his best friend? Will he take the risks and sacrifices? And can he possibly... 𝘂𝗻𝗱𝗼 𝘄𝗵𝗮𝘁 𝗰𝗮𝗻'𝘁 𝗯𝗲 𝘂𝗻𝗱𝗼𝗻𝗲?