The backstory of Yuki was pretty interesting (and a bit melancholic), I was wondering how his love for crossdressing affected his life in the past. I really like the global message: if it doesn't hurt others, you should just be yourself. I also appreciate the precision about the manga being about gender stereotypes and not gender identity (I mean, it was pretty clear for me that Yuki just like women's clothing and doesn't see himself as a woman, but the little clarification is always good).
Also, god, Yuki and Mayu are way too fucking cute. Help. I will die of sugar overdose before the end of this manga. (The "after hug reaction" just killed me. >w<)