Concave and convex school season 3-凹凸学园第三季

The new semester of AOTU Academy begins with the mysterious piano sound at midnight. The teaching team is vague about the mysterious events happening on campus, but puzzles always appear around the students. The art classroom filled with sunshine is filled with thick fog, and the dilapidated old teaching building exudes an alluring aroma... The mastermind behind the scenes actually has the power to close the campus! Students, welcome to join the AOTU Academy puzzle event!