Kamenashi plays a 26-year-old police officer Kota while Tsuchiya plays a 16-year-old senior high school student Kako who meet at a go-kon i.e. group date when she impersonates an university student. They hit it off quickly but Kota decides to distance himself from Kako once he finds out about her true age. However, when Kako gets injured while trying to protect him, Kota is touched by her feelings for him and immediately proposes to her. This is met with strong objection by Kako's father who only relents on the condition that they have to keep the marriage a secret until she graduates from high school. This is no easy feat as they have to lie to the people around them such as Kako having to put Kota's senior high school picture as the wallpaper on her mobile phone and him having to lie that Kako is his younger sister when the purikura they took together is seen by others.
Filming begins in June.
Source: Sanspo / Yomiuri Hochi