I was reading the seventy-seventh chapter of Soredemo Ayumu wa Yosetekuru, and Kagawa Rin figures out that Ayumu likes Urushi, she heads off to confirm it. She finds Kakuryuu and aks him. He responds by saying:
"... I don't know who you heard that from, But it's pretty surprising for Ayumu, right?"
Following this photo:
When he responds to Rin's question he is sitting at a student's desk but next to a window that looks into the hall. The question I'm asking is how is he leaning out of the window. Is this just how schools are designed in Japan or is this just a thing the Author did to be convenient. Any response would be appreciated.