I saw Aqua and Aria as more of a story about growth and maturing but in particular creating a new life, as in getting out of high school or university or maybe even middle school and it being mostly targeted towards girls. Amanchu had some of the same qualities but I agree it didn't hit the same way but I need to re-read it. As for this one. I'm expecting it to also be different and in some way going along the same route of growth but I suspect this is going to be highly influenced by Amano having had a child back around 2010 so I'm expecting and I believe I'm seeing themes around this in the current 4 chapters.