Only After Ascending Did I Realize My Boyfriend is an Immortal Emperor

How should a day in the life of a weed be spent?
Bu Xingjin never thought about this question until one day he became a weed.
Unlike a real weed, he has an idle system that allows him to level up just by basking in the sun.
Crawled on by bugs, stepped on by people, eaten by animals, life is thrilling and exciting…
Until one day, he discovered that the little tree next door seemed to have intelligence too. Bu Xingjin, who had been holding back for a long time, immediately added communicating with the little tree to his daily routine, even though only one or two out of ten sentences got a response.
Through Bu Xingjin’s persistent communication, the two transformed together, traveled the wild lands, grew stronger together, and created brilliance!
Qing Yan, the first war god of the Immortal Emperor who had been in seclusion for a thousand years in the upper realm, emerged. His breakthrough tribulation lasted for a month. Instead of consolidating his cultivation immediately after his successful breakthrough, Immortal Emperor Qing Yan personally went to pick up a little demon cultivator who had just ascended from the lower realm back to Tianyan Palace.
This became the latest headline in the upper realm, and everyone was curious about who this little demon cultivator was.
As the central figure of the topic, Bu Xingjin was also confused. How did the tree that grew next to him, transformed and traveled with him, and fell in love with him, turn out to be Qing Yan, the Immortal Emperor of the upper realm?