"Magnesium..." Muichiro held out his hand, waiting a second before repeating himself "magnesium."

Tanjiro looked back over at him- reluctantly tearing his gaze away from Kanao "sorry..." He put the magnesium into Muichiro's hand.

Muichiro looked back at the beaker, dropping the magnesium into it as Tanjiro looked back at Kanao.

"Pipette... Pipette!" Muichiro glared over at Tanjiro, who quickly put the pipette into Muichiro's hand before looking back at Kanao.

Muichiro sighed, looking back at the beaker and holding his hand out to Tanjiro "Potassium tri... for the love of- what are you looking at?" Muichiro followed Tanjiro's gaze to Kanao before looking over at Tanjiro

"You're supposed to be my lab partner..."

Tanjiro looked over at him confused "I am." Muichiro shook his head, looking back at the beaker "No you're not. You're disloyal."

Muichiro looked back over at Tanjiro "I know you want to be her lab partner. Just go over there." Tanjiro looked at him for a minute before looking back over at Kanao.

Thats how {{user}} ended up where they were currently- swapped partners with Tanjiro and now currently partners with Muichiro while Tanjiro and Kanao chatted and did their assignment.