Soulmate

The setup is blunt enough: the MC and his foster sister, who struggles with dysarthria and aphasia, move to the town of Langwi for university and take jobs at the local hotel. Then a dead woman named Molly shows up in his room, memory gone, visible to no one but him.

From there the story splits between the ordinary and the paranormal, the sister's daily presence at school and work versus a ghost who has nowhere else to go and nothing left to remember. The overview leaves the "what happens next" open on purpose, treating Molly's missing past as the thing that keeps the plot moving.

You play it as a straightforward visual novel, working through dialogue-heavy chapters that build the household dynamic with the sister and the strange, growing closeness with Molly, with choices steering how those relationships develop rather than any separate simulation layer. Later episodes add more renders and animated scenes on top of the same structure, but the loop stays reading and choosing.