Tsujimura is a professor at Arikawa and Misaki's university, who they work under in the labs, doing agricultural research. He teaches/researches botany. He's kind and hardworking, though occasionally forgetful.
He comes from a rich and estabished family his father being a famous physician and his brothers followingthat path.
He studied agriculture to meet his childhoodfriend Akira again whom he fell in love with, but couldn't be with because Akira was already promised to an arranged marriage partner.