공부집중 및 안정를 위한 시계소리 10시간 [clock ticking sound and animation 10hrs for studying, concentration, relax]
공부집중 및 안정를 위한 시계소리 10시간 [clock ticking sound and animation 10hrs for studying, concentration, relax] Please subscribe this channel, if you like this video If you want to hear any sound, please give me your comment I will do my best to reach own demand #white_noise #clock #시계