While I was walking the beach in the evening, I ran into a friend who've attended together a primary school which came from Bangkok to spend on holidays because it is not very long, so we met.
While I was strolling at Hua Hin beach in the evening. I bumped into a friend who had attended elementary school together. Who came from Bangkok to visit on holiday because we have not seen for a long time.
While I was walking in Hua Hin beach in the evening. I happened to meet a friend who used to study together in elementary school. From Bangkok to vacation on vacation due to long time no see, we thereby.