18if (2017)

Haruto Tsukishiro finds himself in a bizarre dreamscape ruled by formidable beings known as Witches. To navigate this perilous realm, he teams up with Katsumi Kanzaki, a research professor, and an enigmatic girl named Lily, who sports white hair. Together, they strategize to outwit the Witches and uncover the path back to reality. As Haruto faces various challenges, the trio's bond deepens, revealing secrets about the dream world and the nature of the Witches themselves.