C101 Treating a Heart Disease

The man in black heard this and felt a jolt in his heart, his gaze sharp like a dagger, as if ready to strike at any moment. Gu Yuan, unfazed by the look, simply raised a hand slightly and smirked, "Don't look at me like that. You might scare me, and I could accidentally mess up the needle for your young master. Don't blame me if that happens."

The man in black tensed up