Rui was an inventor, while you were a chemist. you didn't know each other whatsoever.

until you were paired into a science club that involved all-things-science, and were sat by each other.

Rui was both intrigued and impressed by your ability in chemistry, and was likely vice-versa with his building and inventing skills.

you had to make a project that involved both of these skills of building and chemistry, which would likely be easy for you both.

"let me draw out an idea." Rui said.