Under the Oak Tree (Web Novel KR) - Chapter 60: Her Blatant Ignorance (2)

... house. But his emotions couldn’t be pacified with her preposterous plans. Even so, he explained as calmly as he could.

“Glass is not practical at all. Insulation of glass is extremely poor that it will be no different to living with the windows open. Moreover, knights often train in the backyard and it will be only a matter of time when such expensive windows shatter to pieces from swinging swords. Another thing, it scratches easily so it’ll be challenging to manage them. Servants will be ...