I adore this One-Shot so much! I think I've read it five times now.
Along with the art, and its simplicity of being able to see the heroine's emotions through the color of her irises, the brief drama of being exposed and thinking she'll be hated for it, to then the male protagonist somewhat confess... Beautiful! 8/10.
I love this concept! I'm not sure how it could develop like as a manga, but it could have great potential if it did.
... Out of all of Yaki Tomato's work, this is still my top favorite.