This is the most common area where people get stuck. More hints are probably needed
Inside the classroom where you met the red haired girl, there is a hidden passage you can open with an ID Card
I found two bugs, there are three types of bee animation, entering the next type requires a bee to participate in, at this time, the bee is likely to participate in the failure, and directly stuck in the protagonist's body, and the animation will not enter the next type, when the protagonist stands up, the bee will be stuck out of the map, in addition, when the bee grabs the protagonist from behind, After a short time, the protagonist is knocked down and does not enter the animation