Watch The Summer Online

The anime follows a group of friends Giulia, Maria, Enrico, Lucio and Angelon during the disaster as they team up with a Japanese journalist Shiro Ando, and begin their own investigation of what's occurring (during the week long period of exposure when the ICMESA refused to notify citizens of the poison). As many animals are dying and people are getting sick. The children and Shiro discover deadly dioxin was released and inform Enrico's father, the town mayor, who evacuates all the citizens. Shiro continues investigating more and learns of the negligence of La Roche, a company who controls ICMESA. La Roche knew they were in violating of existing safety laws/protocols and destroyed evidence of their crimes. The children attend a press conference to ruin La Roche's reputation as the destroyed proof might not be enough in a court of law to punish them. Giulia's pregnant sister, who opted to not abort, gave birth to a healthy girl. The happiness is short lived, as the baby prematurely dies from dioxin poisoning.

It has been six months since Yoshiki Tsujinaka's best friend, Hikaru Indou, went missing in the mountains and returned a week later with no recollection of what had transpired. Certain that it is not the Hikaru he knows who came back, Yoshiki finally asks Hikaru about it. Suddenly, "Hikaru" reveals his true monstrous form and begs Yoshiki to keep it a secret, as he does not want to kill him. Despite his paranormal nature, "Hikaru" seems almost innocent, full of childlike wonder and eager to experience the summer heat, the countryside, and all kinds of other things in a human body for the first time. And for Yoshiki, it matters little if "Hikaru" is a fake relying on stolen memories—as long as he never leaves again. As Yoshiki desperately clings to "Hikaru" in his intense grief, it becomes increasingly clear that something dangerous and supernatural may have descended from the mountains into their village.

The 61-minute long movie follows the life of 18-year-old Yi-gyeong (Yoon Ah-Young), a quiet, ordinary student who meets Suyi (Song Harim), an athletic girl who stirs up new romantic feelings in her, causing her to realize her identity. Over the next two years, their relationship helps both women grow, but ironically, because of this development, Yi-gyeong realizes her thoughts about Suyi have begun to change.