All I understand is that it involves peeping through a hole for sfw or nsfw and the idea goes wild in my head.This series is probably not about what you're thinking.
Nozoki no Ana (also translated as "Peephole") is more along the lines of what the title implies.
Asui Tsuyu of My Hero Academia?Posting to once again mention that Frog Girl is best girl.
She definitely stands out. I rate her highly as well.