Hoshi no Hana

Hachisu, a boy with a good grasp of the world around him, gets sat next to a girl in his class called Ageha, who is utterly lost in her own existence. Hachisu feels irritated every time he sees her and thinks that that will never change. The sad love story of two people who come to understand the complexity of human emotions by interacting with each other. (Source: Comico, translated)