Spearman feels like a chill bro to have under different circumstances but it is what it is.
Beatrice on the other hand, her "plan" feels more like a "I'll act like I'm here to kill a bitch but he ain't a bitch he my lover", but it seems like she's a bit of a smoothbrain.
No one can tell what Hiyama's plans are because her love too strong and makes her extremely emotional to the point where it makes her seem bad. That and she seems a little two-faced? But I'm sure it's the hardcore tsun at work there.
What a ride this series was, I got me some diabetes with this chapter.
When I saw the chapter title I thought of https://youtu.be/MVg_wpIfcd4, then later thought of Rick Astley's Together Forever.
LN spoilers doesn't say if MC has any feelings for the girls so idk. But based on spoilers it doesn't feel worth my time so I'll leave this comment here and probably won't come back