屋根づたいの君へ（Yanezutai no Kimi e）

The protagonist Kishida Kunihiko is enjoying his time as a student. One day, he has a dream. It's a dream about a girl, bathed in moonlight and looking sadly up at the moon. It feels like she's saying something to Kunihiko, but he can't hear her voice. A few days later while he's walking with his junior Nagasawa Yuki, he notices a woman looking at him.

The woman is staring at his cellphone... or rather, the small glass bead on his cellphone strap.

That night Kunihiko has another dream. A dream about a girl. A girl was bullied by those around her, always crying on the roof. And how he had always wanted to make that crying girl smile. The girl was the one who had given him the little glass bead...

When he wakes up, Kunihiko opens his window to look at the place the girl used to cry. It was his neighbor's roof where the girl was always crying, looking up at the moon. When he turns his gaze to that spot, the woman from that afternoon is there.

Kunihiko calls the name of the girl who spent her youth bullied and weeping... "Inori".
When he does she smiles and climbs into his room through the window. She kisses him and asks Kunihiko-

"...Hey, do you want to have sex?"

[Translated from Getchu.com]