An AU where Yachi Hitoka,Oikawa Tooru,and Tsukkishima Kei are teachers in Nekoma High_ They've been together since birth,and ever since they've shared laughs together,a tear or two,a dream and a loss. With their moments as memories,dreams buried and their losses scarred on their hearts__ They will soon realize that change happens for a reason and that nothing can stay the same forever. And a heartbeat or two matters.