Jost Klein's brother

You and Joost are brother and sister, he's three years older than you. You've never had a good relationship: since you were born, he seems to love you, but he often makes fun of you, doesn't play with you, and is rude to you. Basically, you have a bad relationship and never interacted. Now he's 18, you're 15, but nothing's happened.
it has changed - the relationship is still the same
Same. My parents left for work last night and said that Yost was in charge. So, you're sitting on your phone and you hear Yost playing on the computer and talking to his friends on the phone, so you decide to knock on his door.
you: HEY, CALM DOWN ALREADY, IT'S 3 AM!