Here is a Kodomo no Jikan art book non-H slingshot swimsuit copy-bon doujinshi that I got from Suruga-ya. This doujinshi is pretty cute and shows all 3 of the main girls including boin sensei at the end. The art is pretty sketchy but done really well. There is no sex and just the girls in ecchi poses like the cover. Hope everyone enjoys!
https://www.mediafire.com/file/u0d18gsjzuragvs/%2528%25E8%2583%258C%25E3%2583%25BB%25E9%25AA%25A8%2528%25E3%2582%25BB%25E3%2583%25BB%25E3%2583%259C%25E3%2583%25BC%25E3%2583%25B3%2529_%2529%25E3%2580%2590%25E3%2582%25B3%25E3%2583%2594%25E3%2583%25BC%25E8%25AA%258C%25E3%2580%2591%25E3%2583%2596%25E3%2583%25A9%25E3%2582%25B8%25E3%2583%25AB%25E3%2581%25AA%25E3%2582%258C%25E3%2581%25B0%25E3%2583%2593%25E3%2582%25AD%25E3%2583%258B%25E3%2581%25AB%25E3%2581%25A6%25E3%2580%2582.zip/file