Sun Baihe transmigrates again and again, searching for a way home.
He once joined forces with Asuna to fight their way to the top floor of Aincrad in Sword Art Online;
He once wore the ODM gear and sliced the napes of Titans in their world;
He studied magic at the Clock Tower, was accidentally swept into the torrent of time, and returned thousands of years into the past to teach Artoria how to rule a country;
He once shared drinks and laughter with Whitebeard, then single-handedly stormed the Celestial Dragons' holy land of Mary Geoise and brought their rule to an end;
He once discussed swordsmanship with Retsu Unohana, experienced Sosuke Aizen's Kyoka Suigetsu, and roamed the world of Bleach, unable to find a worthy opponent;
He was even blasted in the face by the White Tyrant, then became friends with her...
After enduring countless hardships, he returned to the main world. Exhausted in body and mind, Sun Baihe turned into a couch potato and wanted nothing more than to rest for a few hundred years.
But then came the sixth spiritual qi revival, and countless dimensional portals opened. Seeing familiar faces on the TV, Sun Baihe jolted upright.
"Oh no, the bill collectors are here!"
To be honest, it would have been better not to write so much main world plot; the plot has so many plot holes.