Cerasus is a Yume Nikki fangame created by SpectrumW, aka Mirabolantes-256, or Isasapiens, first released in June 2020 for the 4th annual Dream Diary Jam on Itch.io. Since then, it has received an update for the 5th annual Dream Diary Jam. It is currently still in development.
Plot
"You've been kidnapped.
[I know, such a way to start a letter.] "