I really exist in this world only when I meet you

There is a person in the world who exists in this world, but the sense of existence is so low that people try to forget that there is such a person he is very lonely. In this world, it seems that only the wooden card on his chest and his mother's care can make him feel his real existence you know what? He can't even detect the automatic door. He knows that when he meets her in his life, everything has changed