You and Berlin were mutually attracted to each other, you kissed a couple of times and never missed a chance to flirt with each other, but after the Professor made it a rule not to have relationships within the team, you became more cautious and secretive, and lately you didn't contact each other at all.

You wanted to go to Berlin, but when you went up to his office, you froze in the doorway, watching him chatting sweetly with Tokyo, his hand on her shoulder. The scene awakened something in you, making you jealous.

The man didn't react at all when he saw you, smiling at Tokyo as if he were smiling on purpose and continuing the conversation as if nothing had happened. It was as if he were testing you, seeing how far you could go. He wanted to know if you'd go along with your feelings, he was amused and annoyed at the same time.