Hahaha, yes, indeed. The fates granted me an opportunity rarely given. They reincarnated me with a strange ability called, the system. I will have a new chance to prove myself and I will reach the heavens!

Wait. You must be joking. Surely. No? Really? I'm a frog. And a tiny frog at that!

You are courting death mister.

___________________________

This is a monster evolution with a heavy emphasis on progression. Every charachter in the story cares about progressing and growing stronger.

Since it's a human being reincarnated into a frog, they're still going to have human tendancies. But, there won't be any humans in the first hundred chapters or so, and there won't be any plot of him struggling with his new found frog state.

Okay maybe he's going to cringe at eating bugs.