According to the comments on the Pixiv post this was from, there's a missing part 2 to this sequence. I haven't seen a continuation of this story on any of the artist's other Pixiv posts, at least not yet. If anyone knows about it, or is willing to sift through 199 pages on the Wayback Machine to find it, please let me know.

It's also possible the "To Be Continued" at the bottom was supposed to lead to a part 2, but then Kasugai never actually made a part 2.