RC3's manga / #teacher with an interesting hidden hobby(1)

https://newtoki94.com/webtoon/4855149?stx=%EB%B0%94%EB%8B%90%EB%9D%BC+%EC%86%8C%EB%8B%A4+%EC%8A%A4%EC%B9%B4%EC%9D%B4&title=%EB%B0%94%EB%8B%90%EB%9D%BC+%EC%86%8C%EB%8B%A4+%EC%8A%A4%EC%B9%B4%EC%9D%B4