Liked it, found it relateable, I disagree its not overly-sexualised. The 'sexy' pictures were just her drawing mermen, if you find that sexy do not watch the Little Mermaid, loads of mermen there. As a teenager myself I could relate to Mei especially when I was a younger teenager. I rewatched a few times even. Those saying its not for young children, are not seeking the oppourtunity to tell their children about periods and crushes. Which are completely normal, people can get their periods as young as 7, and I believe its time we remove periods as a 'taboo' subject.
I'm gonna rewatch it now.