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 think it's been a fairly 
long time since then.
أعتقد أنه مضى وقت طويل نسبياً منذ
ذلك الحين
Seitdem sind einige Tage vergangen.
Creo que ya ha pasado un tiempo.
Creo que ya ha pasado un tiempo.
Plusieurs jours ont passé depuis.
Da allora, credo siano passati diversi giorni.
Acho que isso foi há vários dias.
Думаю, с тех пор прошло немало дней.