Shadows and Smudges: Tales of Unseen Bonds and Unthinkable Pacts

For several days, my boyfriend's left shoulder bore dirty smudges, akin to a burnt ghost having scraped her claws across his shoulder. Eventually, it was revealed that these marks were from my eyebrows smudging onto him during our embraces. He teased, "What brand is your eyebrow pencil? It keeps leaving this bleak shade behind." However, I exclusively use a reddish-brown eyebrow pencil. Upon returning home, who else had he embraced?
You

He walked alone, a solitary figure on the road. Suddenly, a car stopped next to him, and three classmates inside beckoned him over. Ecstatic, he exclaimed, "I'll do anything, just let me join you."
"Murder, interested?" they queried.
"Eagerly, yes! Who's the target?"
"You'll see when we get there."
He scrambled into the car, unaware of the meaningful looks exchanged by the three classmates.