That Time I Got Reincarnated as a Slime

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) Note: Includes 22 prologues, 17 interludes, and 22 epilogues.

After being killed by a passing robber, a normal 37-year-old guy finds himself reincarnated as Kousaku Shima in 1984. Note: The volume contains the only 2 chapters of the spin-off, 2 chapters of the manga Kachou Shima Kousaku, and one chapter of the manga Tensei Shitara Slime Datta Ken