This comment may come as a little late, but can I recommend afterliving for Mikan? We have Leon, Peko and Sonia at the moment and I'm sure they would absolutely love having her around! (At least, the muns would, not so sure about the characters, haha...) Anyway, the game is set in a high school-based afterlife a la Angel Beats!, though you don't need to know much about the anime to get into the game. Afterliving's events can be both slice of afterlife and horror, plus we're a slow-to-medium, very backtag friendly game!

If you need more info our ad is over here and you're free to test drive here if you need it.