Five childhood friends—Dabin, Jaeha, Taehyeon, Sehui, and Hanbin—make a promise to always stay friends, even after they become adults. Fast forward to the present, where they are now 24-year-olds facing pivotal moments in their journey into adulthood. As they face different challenges, the five friends try to carve out their own paths and figure out what they want for the future, lending each other a helping hand or offering a shoulder to cry on along the way. And amidst it all, unfamiliar feelings begin to blossom where there was once only friendship...