I don't know for certain. But often in such manhwas, the availability of empty rooms can vary depending on the plot and setting. You could start reading it to discover if there is one.
The portable study was a digital reading platform that provided reading guidance, reading evaluation, reading records, reading analysis, and other services for teachers and students. It had been widely used in schools in Jinshan District and Xuhui District Shanghai City, and had become a "portable study" for teachers and students. This platform provided a variety of ways, such as book wall display, reading notes exhibition, book friends tea party, etc., to encourage children to be willing to sink their hearts into reading, and to obtain happiness and a sense of accomplishment from reading. In addition, the portable study could also be registered as a trademark, and it could be registered under different trademark categories. Overall, the portable study was a platform to provide reading support and promote reading habits for students.
It's hard to say. Sometimes the layout and availability of rooms can vary depending on the plot and settings of the manhwa. You'd better read it carefully to get the answer.
It's hard to say. Different manhwa have different scenarios. Sometimes there might be an empty room, sometimes not. You could check the latest chapters for a clear answer.