Transmigrated into the World of Giants

A worker who just got off work at 1 AM was so tired that he fell asleep as soon as his head hit the pillow, but unexpectedly transmigrated into the world of giants after reading a push notification about an Ultraman novel! The monster army launches a surprise attack on the barbarian kingdom, and ten giants of light step forward. And I, an ordinary transmigrator, will embark on my own journey in this cosmic catastrophe of transmigration. — Description from novelcodex.org