Beautiful shots, Surapon!
Love the one with the little girl on the bridge Surapon! the back light portraits are great too! can be tricky to get right.
I have the lastolite ezybox 24" thanks to suggestions by neuro, RC, and some others. So I can personally recommend it now. It's fairly portable and offers great lighting for single and double portraits. And i wanted something of good quality. Not the cheapest though.
5D3, SL1, EOS M, 28mm f1.8, 10-22mm f3.5-4.5, 60mm f2.8, 40mm f2.8, 85mm f1.8, 300mm F4 L IS, 70-200mm F4 L IS, 50mm f1.8 STM, 14mm f2.8 Samyang, Sigma 150-600mm C, 430 EX II, eos m lenses, bags and too much lighting equipment.