That was...underwhelming :/ For Umine-san to suddenly smile like that after just one heart to heart with her mom and for Ayumi-san to not face her feelings even after all the life altering experiences.
It is cute that she still ended up with Shiro but it doesn't feel justified.
Although its bec i prefer him to be a villain rather than an anti-hero but wtvr
Anyway, lots of things happened that needed explanation like what happened to the cult-like thing??? Were Kaga and Shiro actually good friends or in friendly rivalry? If Shiro and Ayumi really had such a great time together, I'd expect a more lasting pain to drive it in that Shiro's a really big loss to her
Or moments that she's still looking at him while she's in Umine-san's body.
Oh, well.