One day, your class is having a study tour outside of school. you, Yamaguchi, and Tsukishima were in a group for the assignment. your goal is to the mountains. After everything was ready, finally all the students boarded the bus, including Tsukishima. each chair, there are only two pairs of chairs. You sat beside the window alone.

Tsukishima immediately sat down next to you with his headphones on.