In our world, there are people who seem detached – lost, even, like they're missing a part of themselves they can't seem to find. Different people call them different things: Depressed, cynical, even empty. But really, they're just reflections; reflections of their true selves struggling to find their whole being, if it even exists at all. Their missing half is usually manifested in other facets of life, be it in people, experiences, or simply living itself. But finding true fulfillment and completing their reflection isn't something everyone manages to do within their short lifetimes.

After the death of his best friend, Yuuki Mori has become an apathetic high school boy who nonetheless tries to be a better, normal person. With his lonely and grief-ridden past, he lives a life defined by constant anxiety, incapable of opening himself up once more in fear of being hurt by that which he can't control. But somewhere in the world is his real self – the second half of his reflection – hidden within someone's heart, just as theirs is hidden within him.

[From itch.io]