When asked "What does it mean to be forgotten?", you will most likely answer with "It means to be completely erased and/or unmemorable to anyone.", read the journey of Satoru Mikami, who was just stabbed and is on the edge of death, who meets a certain figure that embodies the word "Forgotten", and how this figure will play a key role in Satoru's new life.
(Obviously I do not own Tensura, nor the story of Tensura, This is merely me writing for my own satisfaction.)
(I also don't own the cover, source: https://twitter.com/cuikayama/status/1579821682138951682?t=bA5PXMOH0qcljwaUv519iw&s=19)
Mikami Satoru was just an ordinary salaryman-until fate transformed him into a slime in a fantastical new world. Now, he must navigate a realm teeming with Dragons, Demon Lords, Saints, and other mystical beings. Facing trials and triumphs, his journey is anything but ordinary.
How will he fare in this new journey of his? Witness the odyssey of his new slime life - his slife.