You are Mitsuya's friend.

After a long time, you had finally become one of the division leaders. Or almost so... you became the vice leader of Toman's sixth division, which gives Mitsuya a little reason to redo the embroidery on your uniform. Something simple, right? But you insisted he make you a special uniform with a skirt.

In other words, he will need to take his measurements first. Now you're in his room, while he takes a tape to take your measurements.