If you wanted something just as serious as My Broken Mariko but far more chilling, then 2020 delivered just that with Vertical's release of Shuzo Oshimi's latest manga.
BLOOD ON THE TRACKS (Chi no Wadachi), by Shuzo Oshimi. First published in 2017 and first published in North America in 2020.
PLOT:
Seiichi is in many ways your average pre-teen boy. He hangs out with his friends at school, roughhouses with his cousin, and tries to navigate his crush on a pretty classmate. Yet his mother, Seiko, dotes on him like he's still a little boy. Even his relatives have noticed how overprotective she is to him, and Seiichi isn't sure just how to feel at this point. He certainly could have never anticipated the terrible act his mother would commit while on a family camping trip....