At the baseball club of Yame Kita High School in the southern part of Fukuoka Prefecture, fierce competition for positions was always fought. In the qualifying that led to the spring selection tournament (Koshien), the team was beginning to get jerky due to the unexpected defeat. At that time, the main players such as Ace are ordered by the director to go to the drama club. Repulsive players. However, there is a memory of the sad scars of the unexpected seniors.

A smartphone is found during a TV shoot for a show about Jukai near Mount Fuji. The phone contains videos of three high school girls who met online.

High school students go on a graduation trip. They become gripped with fear by the spirit of a dead classmate. Their classmate committed suicide on Valentine's Day, one year ago. She left behind the words "Let's meet one year later." The students must overcome their fear and find out the truth behind the tragedy that took place one year earlier.

Sana Haitani (Kasumi Yamaya) is a member of an idol group. She's following the dreams of her now deceased older sister who always wanted to become a top idol. Unfortunately, Sana's idol group is disbanded. She is then kidnapped and taken to an uninhabited island. What awaits for her is a card battle. If she wins in the card battle against other kidnapped idol girls, she can become a top idol. But, if Sana loses ... she will die.

As the sole survivor of a horrendous and rather mysterious accident, teenage Mitsuko's day is off to a bad start. An unstoppable force of nature, a doomed field trip, and a strange case of amnesia easily coexist in a bizarre parallel universe, where a desperate Mitsuko is always on the run from something inexplicable, intangible, and utterly deadly. However, amid piles of fresh corpses, mounds of scorching bullet shells, and rivulets of fragrant adolescent blood, Mitsuko must fight to stay alive, before her already messed-up day becomes even stranger. But one question still remains: who or what is the enemy?