Ehhh - maybe worth picking up if you liked Planetarian, but if you haven't played that Key visual novel, you should try that one instead, since Harmonia goes for a similar setting and vibe, but is much more hollow

The first half stumbles a long at a weird pace, and characters end up feeling hollow anyway because the story prescribes them a single emotion they aren't really allowed to deviate from

The second half picks things up a bit but the plot twists are really easy to guess, especially when the cast is so small. You can really tell that this visual novel wants to have a dramatic, emotional ending but its put no effort in to earn it so while I got a bit invested towards the end, I could only bring myself to care so much

Good music and visuals but sadly, just kind of boring and hollow, especially compared to Key's other works