Unfolding of events [1]

Thump—!

"Done."

I patted my hands while a body fell flat on the ground in front of me. Taking out one of the tubes Melissa had given me moments prior, I opened the Duke's mouth and poured the contents into his throat.

"Ukhah!"

His body jerked immediately after pouring the substance into his mouth, seemingly rejecting its existence. 

...But I didn't care and forced the contents in.

His complexion gradually began to fade away, becoming paler by the second, while at the same time, scales began to form on his skin, and black veins began to emerge.

"It looks like it's working."

The poison did indeed look rather effective.

'My body is a lot sorer than I thought.' 

Stretching my back, I felt every part of me ache. 

'I guess this is a consequence of ingesting the Duchess's blood.'