Although it is stated in the title, it doesn't completely relay the true nature of the slime. Whether the slime really is just a normal slime and the reason why he will look like the OgMl in the future is because he ate him or the OgMl turns into a slime.
My point is, although it is stated that the slime is the male lead, we doesn't have any information why is he different from other slime. I never ask whether or not the slime is the Male lead cause pretty sure he is. ╥﹏╥
Pretty sure the slime is the ML. They dropped hints in the chapters that when expending too much energy a powerful being will turn into a slime. So I don't think the slime eats the ML, but rather the Slime IS the ML. I also think that maybe the Slime Duke thinks he's stuck like that, but that's a guess lol ╮( ̄▽ ̄)╭
So is the Slime and the OgMl is the same or not? Because some says that perhaps the slime ate the OgMl knowing the the Mc needs to marry him.
But being honest, I feel like the OgMl is the slime because in the first time they met, the slime blushes when our Mc want to atleast kiss the OgMl. Not to mention that on the book (Ch 5), it states that a high level of monster can turn into a slime once their magic exhaust. Wouldn't that make sense knowing that the OgMl is great with magic and the slime was found in a place where there's a high-level monster that a mere slime can't survive? ╥﹏╥