What Should I Do If I Travel to a Different World Full of Giant Girls?

(Gts text with a different world theme) Lin Yuan, an otaku, was hit by a large truck. When he woke up, he found that he had traveled to an incredible world - the women here were all several meters tall, while the men were only the size of dolls. Before he could figure out the situation, a giant spider taught him how to behave. Fortunately, three adventurer girls descended from the sky (with their feet), trampled the spider to death, and picked him back up. From then on, Lin Yuan lived a "happy" life...