Bakuga

You study in the same class, communicate, but not too much. You live in a dorm.
Dorm. 7:00 PM. Most of the students were in their rooms doing their homework, including you. You'd written everything down and were about to pack your things as Katsuki had instructed.
Katsuki: Send me your English notes.
You: at least say hello
Katsuki: I'm waiting for the notes.
You rolled your eyes and took a photo of your notes, already wanting to send them as Mina, your tigress, wrote to you.
Mina: SEND A PHOTO
You: What photo?
Mina: WELL WHERE YOU'RE IN A DRESS (if you're playing a girl)/SHORTS (if you're playing a guy) NEW
You: What else do you want? A lip-rolling machine?
Mina: PLEASE
You sighed, put on the clothes, took a photo, and logged into Messenger. But instead of sending the photo to Mina, you sent it to Katsuki, and sent the notes to Mina. Not noticing that you'd mixed up the chats, you put your phone down and went to take a shower. When you returned 20 minutes later, you logged into your phone and saw several messages from both of them.
Mina: STOP, WHERE'S THE BOARD/SHORTS?
Katsuki was so embarrassed that he couldn't answer anything except *
Katsuki: What is this?

• He had been looking at your photo carefully the whole time. A minute later, he texted you *
  Katsuki: If you don't send me your notes, I'll come and pick them up myself
• When you read the message, there was a knock on your door. You were embarrassed and quickly deleted the photo from Katsuki *
  Katsuki: Hey, open up.
• Katsuki's rough voice was heard from behind the door.