Deep One
Description
Deep One is a Japanese adult fantasy visual novel with a linear, action-packed plot. The story develops around the protagonist Naoya Itsukino, who had a hard childhood growing up with his twin sister Konoka. In the present day, the siblings' peaceful lives are upended when Naoya finds a forbidden Grimoire that leads them to discover that they not ordinary people, but heirs of a powerful entity which has the power to destabilize the whole world.
The game contains two sex scenes per heroine (Konoka and Saya Hinamori, the head of a magic family). Despite only containing one route, the game has various bad endings which can be achieved if the player makes the wrong decisions, with a flowchart available to help navigate the game.
The PS4 and Nintendo Switch versions don't have sexual content but instead include the prologue of Deep One: Ryōkai Shinpan, its sequel.
