My Olympus Seems a Little Strange

By some strange twist of fate, he transmigrates into Greek mythology and becomes Zeus, king of the gods.

"Little brother, you've grown up. As your big sister, it's time I taught you some common sense. A brother and sister should eat together, bathe together, and get married when they grow up."

"Where did you learn this so-called common sense?"

"Olympus..."

Hearing his sister's answer, Zeus covered his face and fell silent. My Olympus seems a little off.