I feel like it kinda went under the radar a bit, which...isn't shocking since the first game was pretty niche too, but I loved it. I mean, it had some flaws, but all things considered, it was a really fun mystery, and the cast was top notch. I probably loved the characters more in this one than the first, which is kind of impressive since I liked that game's cast a lot.
To get into a bit more detail, with spoilers. Heavy spoilers ahead, don't read it if you plan to play the game and don't want spoilers: All things considered, the twists landed for me a bit better this time, and even though the game does actively lie to you, the timeline twist was overall a really fun one. I'm usually not fond of twists that only impact the player, but I can excuse this one since it made the mystery was more interesting than it would have been otherwise.
Bringing back a minor, no-name gag character from the first game, giving her a full backstory, and then making her the second killer was a brilliant move. She went from "That random mermaid chick with a she-has-good-bones gag" to one of the standout characters of the second game. Her somnium and the reveal of how much life just screwed her family over and how much she regretted so many choices in her life that led her to murder was one of the highlight moments of either game.
On the negative side, the game really needs to drop the action sequences. The QTEs sucked and the entire last stadium sequence just made me groan. Even for the game's overly-anime style, it's just...too much. They're never fun or interesting and feel fillery. I also felt like some characters like Ryuki & Tama really suffered from the game's structure, since they're largely missing from the last half of the game and felt kind of unresolved.
Anyway, highly recommend if you're a fan of mystery VNs and/or the first game.
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https://www.youtube.com/user/dotsdfe I make Fire Emblem videos. Sometimes.