Tensei Shitara Sekaiju Datta Ken
転生したら世界樹だった件
A person who lived as a NEET was killed by a robber at a convenience store. A goddess then appeared and chose to reincarnate them in a different world. However, instead of being reborn as a human, they were made into a plant. Strangely, both monsters and people in this world refer to them as "Lord World Tree."