Katsura struggles with anxiety he can only overcome by hugging Sou, his older brother's friend he's known since childhood. But after Katsura is kissed by his best friend Kouichi, Sou becomes jealous and refuses to help him anymore, leaving Katsura to juggle his anxiety and the feelings of two people very close to him.
This was a sweet story. I especially liked the first part, which dealt with Sou and Katsura realizing their feelings for one another. I thought the second part, which needlessly introduced another love interest, was unnecessary. Katsura's anxiety is described as having been caused by Sou when they were younger, when he'd consoled him after an accident and repeated that Katsura would be okay as long as Sou was with him. That's not how my anxiety worked, so it threw up a bit of a flag for me in terms of plausibility - anxiety, for me, isn't something I can get over, it just is - but I'm glad Katsura was able to overcome his.
If I were to re-read this, I'd stick to part one and not bother with the second book.
Rin!