Well, I did it. Finally watched all the unit episodes. I couldn't get every unit, but I almost got them all. I made sure to rewatch Mia's 3 sets of episodes too. I got into the game because of her, and she became my waifu. I love this cute fluffy girl.
I'm gonna miss this game. It was my first gacha, and I played it for just over 600 days (I got the 600-day "achievement" a could days ago). It was surprisingly well made. I thought the main story ran into issues over time, but I really enjoyed the characters, the spritework and animations, and the music.
I might never play a gacha again, but this one was definitely a good experience.