What Do You Mean They Are All Chasing Here from Another World?

Multiple heroines Blue Star World, Dark Domain Era. Lu Changsheng, who was suffering from an unknown "illness", thought he was about to die, but unexpectedly discovered that this "illness" gave him the power of time travel, allowing him to travel back and forth to different worlds... … "Master, finally, one hundred thousand years have passed, Melonelle has finally found you..." Eternal Wizard Melonelle. "Teacher, where do you want to run to this time?" Tylukas, the witch of eternal night. "Mr. Father, you said that I will become the most outstanding saint... No, a goddess. Now that I am here, you are not allowed to leave me again." Saintess and Goddess Shanila of the Earth "You said that only becoming the Demon King can change this era. Why did you choose to leave the moment before the era changed?" The strongest brave, the third Demon King, Reinette … This book is also known as: "When I am on Blue Star, the Shura field comes to my door", "The different worlds I went to are all real", "Developing a World BOSS from Scratch"