I adore the characterization and world building in this game! The small details like most places not having rooms underground are really nice touches, and the MC has a discernible personality rather than being a self-insert.
The aftercare screen is also an excellent edition. Cirrus' scenes are fascinating, but they did make me feel a bit uncomfy - not the BDSM so much as the MC isn't in much of a position to have a say in the situation, regardless of whether he wants it or not - so it's nice to be provided with a break when I need it.