|Episode 34 - The Woman in My Life|
Tsukushi goes to Tsukasa's birthday party... His parents are there, and he says he's going to introduce her to them... The F4 explain that they all have arranged marriages that they can't easily get out of, and Tsukushi showing up to his party as a potential fiancee candidate would help Domyouji out a lot, even if she doesn't actually decide to marry him.
Domyouji's mom sees Tsukasa with Tsukushi, and intimidates her asking her who she is... Domyouji:
This is... the most important woman in my life.</spoiler>