According to the official website for the upcoming film Zutto Mae kara Suki Deshita., the release date is on April 23rd, 2016. The full title of the film is Zutto Mae kara Suki Deshita.:Kokuhaku Jikkou Iinkai and is inspired by the vocaloid music group HoneyWorks. Along with the release date and the cast, the following visual was also released:

Below are the character designs and actors who are portraying the cast:

Yuu Setoguchi played by Hiroshi Kamiya

Natsuki Enomoto portrayed by Haruka Tomatsu

Souta Mochizuki portrayed by Yuuki Kaji

Akari Hayasaka portayed by Kana Asumi

Haruki Serizawa portrayed by Kenichi Suzumura

Miou Aida portrayed by Aki Toyosaki

Koyuki Ayase portrayed by Tsubasa Yonaga

The following preview was also released. Unfortunately, as of right now the video is currently region locked.

Image Source

Source: Comic Natalie