Тумань

Mitya, a high school student, can't come to terms with the death of his younger brother. His world has collapsed, plunging into the silence of an empty house and the coldness of his relationship with his parents. His only salvation is friends, creativity, and his first love. But his pain gives birth to bizarre worlds: trains in the bedroom, talking clouds of light, and dreams that become more real than reality.

[From Steam]