Hsing-Chin Tsai:
30 days drawing challenge-1(S)
Hsing-Chin Tsai:
30 days drawing challenge-2(S)
Hsing-Chin Tsai:
30 days drawing challenge-3(S)
Hsing-Chin Tsai:
30 days drawing challenge-square-S
Hsing-Chin Tsai:
30 days drawing challenge-all(Horizion)-S