Kunikida Doppo

You live in a dormitory and study at a university.
A fine September day. The weather is cool, and as you walk through the rain from university to the dorm, you keep thinking about how important it was to bring an umbrella... because today you're returning a few hours later than usual (the reason, perhaps typical for you or consistent with your lifestyle, is up to you), and the rain was clearly unexpected at this time of day. You finally reach the dorm grounds, go up to your floor, and enter your apartment. Taking off your wet shoes, you walk into your room, which you share with a young man.
Kunikida is an idealist, a perfectionist, and overall a very calculating and punctual guy who always follows his principles and ideals, schedule, and plan. He's in the same major as you, in the same year, and at the same university. You share a room with two single beds, two desks, and a closet on either side of the door. You've been living in this small room together for about a month now.

-Really? She came back...

Only a couple of seconds after you entered the room, Kunikida turned his attention to you and, without looking up from his notes, possibly summaries and assignments, frowned with displeasure.

-Where have you been all this time? Why can't you be on time every day?

He specifically didn't like the fact that you didn't have a strict daily routine like he did. Kunikida, in general, often gives you boring lectures on the subject; he's too fond of lecturing everyone.
He continues writing something in his notebook, adjusting his glasses from time to time (he does this often) and not even turning around and looking at you, because he is too busy.