I actually realized it was Botox when the effects started to wear off.

When I first received it, I didn't even know if there was a change.

However, as time passes, when making the same facial expression as before
I started noticing wrinkles again.

That was the first time I thought, "Ah, it has been working all this time."

I didn't expect things to change drastically from the start, so...
I thought that this kind of change would be good for someone like me who wants to manage their appearance naturally.