The issue was caused by a platform error, but despite it not being the travel agency's fault, they provided complete care and kindly took responsibility, allowing us to successfully complete the tour. Since the problem occurred at the start of the tour, they upgraded us from the original speedboat tour to a pirate tour, which thankfully was quite satisfactory. (The following is a description of the pirate tour.) Most of the program activities are voluntary, so you can choose between relaxing, eating, and resting experiences, or active activities (snorkeling, trampoline, paddle boarding, diving, water slide, fishing experience, etc.), making it enjoyable for men, women, and all ages. It would be perfect for families. We could have had an unpleasant experience on the first morning of our trip, but the staff really did their best to accommodate us and take care of us. Also, thank you to guide Mr. Lee, who was busy leading so many people alone but continued to take care of me separately, and to guide Nana, who was full of energy on the pirate ship. Thanks to them, we were able to start our Nha Trang trip in a good mood. Thank you!