Ahhh, reciprocated love. Sometimes it's nice watching two people just enjoy each other's company.
The two main characters are set up to be opposites to each other. Takamine is tall, emotionally reserved, and generally self-confident. Shibuki is short, passionate, and unsure of himself. On the surface, it seems like Takamine already has it all figured out and is one-sidedly providing emotional support for Shibuki. But I think they both have insecurities and by accepting each other as they are, they are helping each other get over them. Yuuki Shibuki is obviously sensitive about his stature and feminine appearance, but Chikago Takamine's constant support and acceptance make him much more comfortable with it. However, Takamine also seems a bit bothered by the fact that she can never achieve traditional cuteness--probably also because of her stature. Though it's not as explicit, she has shown signs of becoming happier just by being around Shibuki.
I love how their relationship is built on openness and honesty. Whenever Shibuki dons a fake smile, Takamine instantly calls him out on it and asks him to be straight with her. And she'll get pissed--or as pissed as her cool-as-a-cucumber personality will allow--if it seems like he's not being completely open with her. I hope as the manga goes forward, he will only get better at being open and honest with her and that the author won't periodically use "faking emotions" as a way to keep drama in the story.
[Reviewed at chapter 18]