Rimuru and his friends go to the "Magic Tower", a place where magic from all over the world gathers to develop new special moves, and they are supposed to be busy with their research, but they get caught up in a conflict... 
(Source: Official Website, translated) 
Notes: 
- Chapter 0 is included in the total chapter count. 
- Adapted from a new webnovel written by Fuse in celebration of the 10th anniversary of Tensura. 
- The story takes place between volumes 9 and 10 of the LN.

Living alone and never having had a girlfriend, 37-year-old Satoru Mikami is dissatisfied with how his life has turned out. But after dying at the hands of a robber, he awakens to a fresh start in a new world...as a slime monster. 
 
(Source: Yen Press)

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