Manga by author Sum Na Gi - Status ongoing

Shevon is a writer who lives in a run-down apartment in the streets of the slums. One day, strange memos start showing up at his front door. Before he can uncover the mystery behind them, he encounters a beautiful young man that keeps peeling onions on the staircase next to his unit. After accepting a dinner invitation from the young man, Shevon discovers a dead body in his host's bedroom