Started with my first VN in Japanese but the difficulty level is low as a prep for N2. I just wanted to read this to know more of the story and to ease me into reading long texts of Japanese for up an hour at one sitting (though one could say JLPT exams are 2 hours of reading as well). The VN is high school setting/countryside, harem stuff so while the VN has unique words here and there, the grammar isn't the most complicated. The author also likes to use kanjis for words that are commonly written in hiragana (so a lot of unique words using non jouyou.). But I still think this one is N3 level at its core.
I know that stuff like this isn't the best prep material for the N2 reading section, but I want to for now use my December vacation and January-March to just read something I'm interested in without it being felt as a chore and still get something out of it with reading (vocab, speed, figuring out meaning of unknown words through context, guessing the reading of kanji etc.). I will return to studying JLPT specific reading prep materials come April-June after I have built more vocab and grammar. I also have Migii JLPT app and have a 180 day roadmap for N2. The reading section is still 80 days away.
Now for my main question, I stumbled upon this site jpdb.io which claims to use machine learning to analyze different types of Japanese media and give them a difficulty rating and percentile. I've listed here the VNs/manga/light novels I currently have access to and I want to ask if you were studying for N2, which one of these should I go for next after I'm done with YnS (I only plan to read Nao and Sora's routes for now).
Difficulty % / percentile rank
Visual Novel
Yosuga no Sora 12%/21%
Steins;Gate 55%/65%
Fate Stay Night 75%/85% (I'm still in the Fate route, near the end but I'm playing this currently with English text. Though I may try to go with Japanese for the UBW route next but this has the highest difficulty in the media I have.)
Light Novel
Kimi no na wa 42%/58%
Tenki no ko 49%/65%
Manga (but the difficulty score is from anime version)
Kimetsu no Yaiba 54%/63%
Kemono Jihen 46%/62%
Given 31%/42%
by ManyFaithlessness971