Both of them deals with the ML who cannot hear. See your love goes more the depth with the sign language. And in both the ML is somewhat secluded and tries to be with him/themselves. And support they get from another ML is heartwarming

Both of them deals with the ML who cannot hear. While in BCYD, its not shown in depth and the ML starts to communicate as soon as wearing hearing aid, HGK deals with more problems with the lapse of time.