Kako

A girl who suddenly shows up inside the protagonist's dream, someone who exactly looks like Mirai. In the dream world, she stands on a sandy beach of a beautiful sea, where a lighthouse can bee seen in a distance. Despite being rejected in the real world, the dream world of this girl is really gentle, and treat him with kindness. She claims her name to be "Kako."

"This place is probably only a dream world for you, but for me, it's my only world."