Nanase Nishino

Hongo Takeshi awakens to discover he has been transformed into a grasshopper-hybrid cyborg. Becoming the Masked Rider, he must fight the mysterious evil organization SHOCKER to protect all of mankind.

Kazuyuki Kuga aspires to become an actor. He auditions for the lead role in a theater company's next work. Among the 300 people who take part in that audition, only 7 people are selected for a final audition round. Kazuyuki Kuga is among the final 7 participants. These 7 people then travel to a snowy mountain villa and stay there for 4 days to take the final audition. By the director's orders, all contact with the outside world are not allowed. Soon, the participants begin to disappear one by one.

Saijo has an ability to see special glow around women who are in love. Kitashiro, his childhood friend, the only person that knows about his ability, has had a crush on him most of her life, but Saijo tells her that she doesn't emit light around him which leaves her at a loss. Meanwhile, their classmate Yadorigi, who has a habit of liking guys belonging to other women, mistakes Saijo as Kitashiro' s boyfriend and makes a move on him. One day, Saijo accidentally sees a notebook that belongs to Shinonome, a girl who is trying to explore the meaning of love. They start an exchange diary to discuss the topic, but Kitashiro feels uncomfortable watching them deepen their relationship. And when Yadorigi sees this, she decides that she too wants to start an exchange diary with them.

Newlyweds Nana and Shota move into an apartment. Two situations, different from the drama series, take place: What if Shota attends the resident's meeting and not Nana? and What if exchange murder game doesn't begin?