Marble Mirage

A snowstorm traps eight men inside an exclusive spa called Marble House, and by the time anyone notices, one of them is dead. You wake up with your memory in pieces, no clear alibi, and six remaining guests who all seem far too willing to get close to you.

The setup is part murder mystery, part romance gauntlet: someone in the house is a killer, and figuring out who means untangling both the other men's motives and your own missing memories. Every relationship you build doubles as a suspect interview, which gives the flirting an edge the genre usually skips.

You spend your time talking to the six men, chasing fragments of memory, and deciding who to trust and who to fall for, with the threat of a second body hanging over every choice. It's voiced, illustrated in 2D, and built around romancing men rather than juggling a full harem, so the mystery stays personal instead of sprawling.