Since there is no neutral rating. I rather not recommend this game (for most of people). Here is why:

Game lacks of QoL features esscencial for a VN. Like flowchart, skip tutorial, skip all text (including mission intro), skip mission (is a waste of time for replayability), affection meter and inventory (we got a object that we should able to examine).
I didnt like this VN writting. The protagonist overthinks everything around him, this just adds more text. He doesnt have character development. He is just there to "make decisions", but is not necessary for the plot (IMO). Both girls could be better protagonist.
In this aspect VN with real life characters have gained popularity because they abandon this "old VN format", for one more fluid with more dialogues between characters, like theater. I think this old VN format is not appealing to most of users.

Now the Shmup. There are core features missing in this game. The hitbox is too big (Lassplane is too big), no bomb mechanic, upgrades are lost between missions (in the story mode could be ok, but there is no excuse for arcade mode), I feel like the screen is too small to move in (especially when there are many enemies that explodes and indestructible objects flying by). Game has interesting mechanics like "slow mode" and "assist", but we can only use it in ONE mission.

Overall this game could be better. It reminds me of games like Dead End Re;Quest (same tone, but less disturbing) or animes like Saikano: The Last Love Song on This Little Planet (background development).

Probably this game is not for everyone, even it was probably the target audience. I have patience, I was even making a guide, but after playing for 16 hrs this game has drained all my willpower to unlock the rest of the Endings, because the amount of time to explore all chat option feels too much.