Mikami Satoru, a businessman, is stabbed by a criminal on the street and killed. When he regains consciousness in the darkness, he finds that he's been reincarnated as a slime! With nothing better to do, he spends his time devouring all the rare herbs and precious ores he comes across. As he does, he encounters the Storm Dragon Veldora, who was sealed in this cave 300 years ago by a hero's "Unlimited Imprisonment" skill. He's frightened at first, but as they talk, he becomes friends with the long-isolated Veldora.
I felt pretty damn lonely just because 
I never had a girlfriend in 37 years...
شعرتُ بالوحشة اللعينة لمجرّد أنني لم
أحصل على حبيبة خلال 37 عاماً
Yo me sentía solo
por no tener novia por 37 años.
Yo me sentía solo
por pasar 37 años sin novia.
Moi, je suis resté célibataire 37 ans,
Io mi sentivo piuttosto solo per non aver avuto
neanche una ragazza in trentasette anni...
Eu me sentindo mal por não ter
namorada durante 37 anos...
У меня подруги не было тридцать семь лет,
а я страдал порядком…