With winter break over, students in Japan are looking at a straight shot with no major breaks until the end of the school year in spring. For teens in their third and final year of high school, that means it’s almost time to take the big step of going off to college or finding a job, both of which mean probably having to cut back on silly hijinks.

That’s why when one Japanese 12th grader found an empty classroom, she couldn’t resist the temptation to let loose with youthful exuberance, especially since she knew it might be one of her last chances to do so. She didn’t take advantage of the lack of adult supervision to vandalize the school, though, but decided to beautify it with some awesome Frozen chalkboard art instead.

Earlier this week, as she walked towards the gate on her way home from school, Twitter user Rena Rena realized she’d left something in the classroom. Heading back to retrieve it, she looked at the big, empty blackboard, and figured that with classes done for the day, no one was going to mind if she used it.

Especially not if she was going to create something this amazing.

▲ “I realized I don’t have much more time left as a high school student, so when I went back to get something I’d forgotten, I went a little nuts drawing on the blackboard. Really had a fun time.”

One of the drawbacks to chalkboard art (aside from the difficulty in working with the medium, of course), is that the dark background and powdery nature of the chalk itself can make the end result look dark and wispy. Neither of those is a problem, though, when you’re drawing snow queen Elsa on a snowy, windblown mountaintop as she creates her magical ice castle in the middle of the night.

Rena Rena says the whole thing took three hours from start to finish, which leaves us impressed by both her commitment and talent, since we don’t think we could have done half as good a job with twice as much time. Japanese Internet commenters were similarly blown away, saying that it’s going to be a shame when the teacher has to erase the mural at the start of the next class.

But while it may have been the fleeting nature of youth that compelled Rena Rena to grab a piece of chalk and start drawing, this doesn’t have to be the end of her artistic career. One commenter asked if she was planning to enroll in art school after graduation, and while we’re not sure whether or not that meshes with her higher education plans, it definitely looks like she’s got the talent if that’s the path she wants to take.

Related: Rena Rena Twitter
Source: Jin, Twitter