Asagao wa Yoru kara Saku

In a high school where everyone knows each other's names, Yuugen lives a life devoid of color. He's a sickly boy with zero motivation, avoiding interactions with his classmates and leading a mundane existence. However, there's one person who consistently calls out to him every day: Hideto, a bright and outgoing individual who is loved by everyone. Yuugen harbors feelings for Hideto that he has yet to express, but their relationship remains unrequited. One day, Hideto's sudden passing leaves Yuugen reeling. As he struggles to come to terms with the reality of the situation, a ghostly apparition appears before him - Hideto's spirit, bound to this world by unfinished business. Hideto enlists Yuugen's help to resolve his unresolved issues, and in doing so, Yuugen finds himself entangled in a world beyond his own.