Planetary evolution, how come you're Ultraman?

Seven billion people from Earth collectively traverse the Astral Trial Grounds, each starting with a miniature planet. In 24 hours, a terrifying wave of cosmic radiation will engulf everything. Lin Chen, an ordinary college student, awakens his SSS-level superpower, "Evolution Truster," allowing him to transform into Ultraman Nexus! His impressive stats allow him to easily shatter the invincible shield of a raider! The Astral Realm is fraught with danger: giant motherships, monster hordes, robot legions, and mysterious elven beastmen natives arrive one after another. Lin Chen, along with three beautiful female teammates, plunders corresponding resource-rich evolution planets, unlocks Ultraman's ultimate form, and forges a legend of light in this Astral Realm!