ZEROBASEONE is preparing for a comeback with a teaser film for their track 'Reserved' and has released a promotion schedule for their Japanese EP 'Kaiki LOVE,' including the pre-release single 'Existence.' The group is also active in various projects, with member Sung Han Bin returning as an MC and donating to charity, while Kim Tae Rae contributed to a drama soundtrack and Kim Ji Woong will miss some activities for acting roles.