I will gather here some ongoing thoughts to have them in one place. 
reply: Book 9 impressions (Ongoing - 19%)
You started with volume 9, cool! 
The background story about Noriko and her being the PoV is really interesting, right? I also like her interaction with her - was it her grandma? - relative, where she is staying. This volume definitely gives a lot of depth to Noriko’s character.
I really had picked a difficult volume to start with volume 9 back then +laugh+ I hope it gets better before you encounter the Buddhism stuff
There won’t be many people probably right now to read about my following thoughts, but wanted to drop them here as long as they are fresh
Book 28 impressions
I reeeally loved this book. It’s Yumi’s and Touko’s date where they visit the hospital of Touko’s grandfather. Most of this story is covered in the last episode of the 4th anime season, but what really got me in the novel was how you could really feel their dialogue or to be more precise the stillness. Both are thinking. Both are feeling. It feels so right that Yumi is mostly listening without judging. And it is so relatable how they look outside the train or bus, or sharing a meal without so much talking. Everything is kind of shadowed by Touko’s sad feelings about her past and whereabouts. So it would not fit to try to cheer up the atmosphere here. This is so sincere.
Then we also have a story about a sister pair (need to check the names later), where one got into accident and a memory loss. That almost feels like the openings of Isekai mangas. A little dramatic, but I really enjoyed this! Also the kind of triangular relationship between those three girls.
Book 29 impressions (Ongoing - 50%) - spoilers hidden in subdetails
フレーム オブ マインド (ongoing)
I wanted to read how the main story continues and not some background stories. Though they are interesting I was a bit frustrated. Until now I don’t know how exactly Yumi and Touko became sisters though I suspect they met before the statue of Maria. I’m also not sure whether it is on the same day as the date. Probably not because of the atmosphere from the last volume, but I’m really curious.
So currently there is a background story about Tsutako-san preparing for the farewell of her Senpais in the photography club. She needs to select some photos that were not officially presented or create new ones. I think they are doing some kind of presentation with this within the photography club later as kind of goodbye present.
４月のデジャブ
One of my favorite stories in Marimite so far. Ichigo gets into an accident right after the entrance ceremony. There was one girl she befriended with, but she couldn’t remember her name. Only her voice and she was sure she had visited but her mother declined. Ichigo was unconcious for one year and then gets back to school and befriends one, she thinks might be the one she is longing for.
We then have some kind of misunderstandings with お姉さん and I really like this kind of linguistic misunderstanding (先輩のお姉さん vs. 本当のお姉さん). We also have a bit of drama with almost another accident. This situation also felt a bit like the entrances to Isekai stories, laugh, and I enjoyed it. Really interesting story!
三つ葉のクローバー
This story is about Mayu who is in the same year as Yumi, Shimako, Yoshino, Chisato. And also a tragic one. I really liked how Mayu’s feelings are described and how her story is connected to Chisato and her longing for Rei. At the same time I had a bit tears in my eyes when Mayu meets her ex-big sister and her classmate from kindergarden, Akemi. I like Mayu’s background story with Akemi and could relate to “searching for the four leaved cloverleaf” that it would bring luck and also that one could search for like hours in the hope of finding.
I kind of connected to Mayu a lot in her way of thinking. Though I probably would not have acted upon them like searching for the best big sister out there.
枯れ木に芽吹き
This is about Shouko’s real big sister, Katsumi, who is three years older than her.
The story begins with Shouko visiting her sister in her room and giving her a picture as a present and then goes a bit into Katsumi’s past that is related to that picture.
While reading I was calculating like "Ah, then Katsumi must have been the same year as Youko, Sei & Eriko. Oh, it would be so cool, if the picture was a picture of Eriko … and I was so happy when I was right. 
A little bit of fan-work for me. +laugh+
Though what I enjoyed most in this story was to actually get a bit more background about Shouko. And the more I read this volume I assume we will get a lot of infos also about Tsutako and Shouko and in フレーム オブ マインド hopefully get to see how the relationship between Tsutako and Shouko evolves. Shouko is kind of an interesting character, because I cannot really grasp her. And also Tsutako somehow gets more mature the more the story goes on 
黄色い系
That was totally unexpected and such a fan moment for me! Reading the title I was thinking this might be about some background story with Yoshino, but it actually was about how Eriko-sama found, decided and made Rei her little sister. Such a nice story! I really enjoyed jumping into her PoV storytelling. And somehow … I often thought how typically this was for Eriko-sama. Like in the beginning standing there and watching the new first years coming to school. Just watching if somebody sparks an interest. And one day right when she wanted to give up for the day Rei appeared, running, as she seemed late, but then meeting her again before Maria’s statue, standing there a long time, Eriko-sama was wondering “Didn’t she run before? And now she is praying so earnestly?”
I really enjoyed how we as the readers could observe that Eriko-sama somehow ended up following her, watching her, trying not to be too impolite, then getting excited about all the stuff she does not know about this first year student and that she wants to get to know this by herself and not getting any information from her big sister.
Also what I recognized is that the three roses where all addressed with their titles still. We do not get any names from them. So the big sister from Eriko-sama is just the yellow rose.
And again the new years students ceremony get some meaning. Eriko-sama now understands in which class Sei is, and directly after the ceremony is going to meet her. Also Youko-sama is leaving early. I wonder, whether we get her background story one time, too.
