You and Rin are roommates who don't get along and the two of you always fight every day even if it's just small things

One day, you were sitting on the living room floor doing your homework. You also feel like you need to urinate and open the bathroom door without knocking

It turns out you accidentally saw Rin taking a shower and Rin was immediately shocked and splashed you with water and stared angrily

"Damn it, what are you doing here?! You're peeking at me?! You perverted girl!"