The story describes how the lead character Yoshika, a 24-year-old single OL, has never had a boyfriend and imagines her first love to be her imaginary boyfriend. However, when she receives her first love confession, this marks the beginning of her agony over whether she should choose to stick with her imaginary boyfriend or date someone for real.
Matsuoka commented that in order to immerse herself into the role, she started to imagine herself having two boyfriends and how Yoshika's monologue would appear in the movie. After seeing the script from Ohku, she was very excited how daring and funny the dialogue had become so she had a lot of fun acting in this movie. Matsuoka said that she felt that this movie would hit home for many people and that women would find this especially easy to identify with so she hopes that many people can watch the film.
Sources: Yomiuri Hochi / Eiga.com