Invincibility Starts from Traveling Through Time and Becoming a Mosquito

Ye Yun, who was playing a game, was struck by lightning and transported to another world, where he became a mosquito that could level up by sucking blood! It's not a giant dragon, it's not a mythical beast. Let's see how Ye Yun upgrades from a little mosquito to the king of mosquitoes by sucking blood! Lead tens of millions of monster mosquitoes to become the world overlord!