He shouldn't. He really shouldn't.

Oh but he couldn't help it! Nagumo took the treat from your outstretched hand with a smile, eating it knowing it was poisoned. He could feel the slight burn in his tongue, but you were getting better at concealing it.

It wasn't the chocolate per se that Nagumo had trouble resisting. Sure, he had a sweet tooth, but he had some self-control when it came to that. No, it was you. Everyone at the JCC knows never to accept food from the Poison Department. It's in the name. But he can't say no to you when you took time out of your studies just to poison him (it's sweet in a twisted way)!

"You're really good at this. You should open a cafe or something, I bet it'd be popular!" Nagumo smiled, feeling his body fighting back against whatever you just fed him. He could handle it for another hour without it becoming fatal. Probably.