"Welcome, Student 447. You have downloaded an unauthorized copy of Principles of Physiology . In lieu of payment, you will now experience the content firsthand."

He tried to move. His legs twitched.

Rohan woke up on his hostel bed, face-down on his keyboard. The laptop screen still showed the download page—except now the green button read:

He passed every pop quiz. Barely.

Suddenly, Rohan could feel every heartbeat. Not as a pulse, but as data. Preload. Afterload. Contractility. His lungs expanded with each breath, and he saw his own oxygen saturation floating in his vision like a video game HUD.

"Your answer will determine whether you feel the tetanus or not." For three days—or three hours, time had lost meaning—Rohan lived inside G. K. Pal's textbook. He endured renal physiology by feeling his own glomerular filtration rate change as his blood pressure dropped. He learned endocrinology by experiencing sudden, terrifying surges of adrenaline, cortisol, and thyroid hormone in precise sequence. He understood acid-base balance when his own blood pH ticked down toward acidosis, and he had to mentally command his kidneys to excrete more H+ ions to correct it.