また殺されてしまったのですね、探偵様

Sakuya Otsuki is a high-school detective following his legendary father into the trade, with one grim advantage: he comes back to life after being killed. It is a useful trait, because he has a habit of ending up the murder victim himself, as he does aboard the luxury cruise ship he is sent to infiltrate. Every time he opens his eyes again, his sharp-tongued assistant Lilithea is there, ready to help him name his own killer. Based on Teniwoha's light novels.