I Dozed Off in Math Class and Transmigrated into a Martial Arts Grandmaster

In math class, I was staring blankly at the complicated function graphs on the blackboard when my phone started vibrating like crazy beneath my desk. I sneaked it out and saw an unfamiliar link. For some inexplicable reason, I tapped it, and a blinding flash of white suddenly burst across my vision.

When I opened my eyes again, I found myself in a dense bamboo forest, soaked from head to toe, my clothes changed into coarse hemp garments. ...