A man pretended to be a boy's mother and was laughed at by his classmates when his wig fell off while running. Which movie clip is this?

A young couple were sitting on a rumbling train together. When the train entered a long tunnel, it suddenly became dark in the carriage. The girl thought, at this time, if she ... thought of this, she blushed. As expected, the young man's lips turned up, and with a long kiss, the girl fell into the ocean of happiness.

The sun shone in again, and the girl still blushed and whispered to her boyfriend, "hate, so cruel." Boyfriend paused, "what's the matter? What have I done? " The girl exclaimed, "Didn't you just kiss me?"