Lend You Half a Second of Spring

The heroine Shen Yu suffers from rare emotional achromia: Her world is always black, white and gray, with no color visible. The only breaking rule: only those who are truly moved by her can briefly color her world. The heartbeats of everyone in the world are fleeting, weak and dim. Only the male protagonist Lu Chi's heartbeat is the only exclusive preference in the world that can retain her lasting color.