If you're looking for manga similar to Seizon: Life, you might like these titles.
A locked-room mystery where 12 kids go into an abandoned hospital to give up on life. In the room where they meet, a boy is already lying dead, and no one knows who he is.
Is it a dream or is it reality? As multiple dark rumors spread across the school regarding the mysterious new transfer student, Watazumi Makia, strange events repeat themselves inside Sena Koji's dreams and his reality. He can't tell whether these events are actually happening, or if they are only just a bad dream. One thing is obvious: Watazumi Makia has something to do with the sudden deaths of his classmates. Koji now must face the nightmares that are killing off his classmates.
“R“ or rather Room 402 is the room where our illustrious female main character lives. One day which seems to be by mere coincidence her fate intertwines with that of Sasamoto, a savvy man who seems to be down in the dumps. That is until he picks up a trinket which fell from her nether regions. Prepare yourself for a story of sexual psychological horror as Sasamoto enters into a brave new world.
Newly adopted orphan Hitori Sonoyama appears to be the perfect child: Sweet, loving, and adored by his new parents. But the truth is "Hitori" is not real; he's a role played by identical twin brothers Migi and Dali. Determined to find a way back to the place of their birth to avenge their mother's death, they've wormed their way into the hearts of an aging couple who live there by pretending to be one seemingly angelic child. But upon their arrival, they'll need to investigate the village and its residents to figure out who the murderer actually is, all while doing whatever difficult, painful, or bizarre things it takes to uncover the truth and make sure no one discovers their secret in the process.
A new government project is starting, where former convicts are relocated to towns without the knowledge of the citizens who live there. The trial city is Uoboka, a small town that was once a busy seaport. Now, 11 former violent criminals are being relocated to the town, and the only ones who know are the mayor and his friends. What could go wrong?
Always leave work on time! Never work overtime! Because my dear Kyouko-san is waiting for me to return. I love, love, love, love, love, love you, Kyouko-san. I'd do anything you'd want me to. A "please" from your lovely lips could make my whole world crumble. A comedic love about too much love with a little distortion.
Haru awakens in a hospital bed, having successfully received a heart transplant. He came to the facility for the operation, as it's renowned for its ability to get anyone a transplant no matter what, with no wait list required. But soon, Haru begins to remember his donor's memories, and begins to discover what's really going on behind the hospital's walls...