"Enough. Stop looking like you want to eat someone." Rokuya casually tossed the metal cylinder to Shinobu.
Shinobu instinctively reached out to catch it. Feeling the cold metal against her hand, she asked in confusion, "What's this?"
"Weren't you curious about that Medicine?" Rokuya walked to the window, folded his arms, and leaned against the frame, watching her with a half-smile. "Tamayo made two doses. Here's the other one."
At those words, Shinobu's eyes flew wide open, and her breathing quickened instantly. She carefully unscrewed the metal cylinder's lid. Inside lay a transparent glass tube that likewise gave off a faint blue glow, the liquid within slowly swirling as though it had a life of its own.
"This... this is that miraculous Medicine?!" Even Shinobu's voice trembled with the fervor of a top physician and poison expert who had just laid eyes on a peerless treasure.
"That's right. I'll leave this dose with you for now." Watching her look as though she wanted to press her eyeballs against the test tube, Rokuya couldn't help cautioning her, "I know you're a research fanatic. I'm giving you this to satisfy your curiosity, and to see whether you can reverse-engineer its ingredients and use similar things as substitutes."
At that, Rokuya's expression grew a little more serious. "But listen carefully, little butterfly. This stuff is extremely precious. I'm only lending it to you for research. You'd better be careful. Don't ruin it or waste it."
"Once you're done studying it, remember to give it back soon. This is my damn ace in the hole for staying alive." Rokuya deliberately put on a stern face as he threatened her.
Shinobu rolled her eyes at him, carefully replaced the metal cylinder's lid, and hugged it tightly to her chest as though cradling a child. She