Blood on the Tracks (2020)

No ghosts and no monsters, just a mother. Seiichi is a quiet middle schooler with an overprotective mother, and on a family hike he is the only witness to something unthinkable she does. Shuzo Oshimi then stays inside the boy's head, with long, nearly silent sequences and close-ups of his mother's face until a smile becomes the most frightening image in the book. This is psychological horror at its most suffocating: slow, intimate and hard to shake. The story ended in Japan in 2023 after 17 volumes, and Vertical publishes it in English.