Rui really admires her friend, Tsukasa. Because he is so self-confident, funny, ambitious and hardworking, and also caring to others. She likes to spend time with him. Rui also realizes that Tsukasa loves her (it's obvious). And it's mutual, Rui has crush on him too. But if Tsukasa is a real man, then he will be the first who will confess. Rui is grateful how Tsukasa tries to turn her ideas and scripts for the show into reality.