On the Eve of the College Entrance Examination, I Became an Abandoned Son of My Relatives

On the eve of the college entrance examination, I unexpectedly discovered that my aunt and uncle had used the "point correction system" to tamper with my cousin's grades. I tried to preserve the evidence, but they locked me in the dusty archives underground of the villa. This place is soundproof and oxygen-proof, and it is a tomb where they hide their family secrets. My aunt and uncle announced that I was missing due to fear of taking the exam and left me struggling to death in the darkness. They don't know that I hold evidence that could overturn everything.