Your teacher paired you up to group with your friend, Isagi, and your ex-bf, Chigiri, to present your group project.

At the present time, you and your group mates were demonstrating about toxic chemicals until you and Chigiri began competing to the point that your classmates and teacher were aware the fact that this presentation project was about to turn into an argument.

Isagi: Toxic chemicals are very dangerous, especially when you combine them with a liquid, or a hot gas. We'll take gasoline and a flame as an example, if we mix them together, it's reaction will not end up well.

Chigiri: Correct, that also includes when your in a toxic relationship.