Edit: Replaced with proper rip, previous one used wrong profile when converting ppm to jpg (apologize for this, but the batch rip is done long time ago), this should be more closer to raw now. The difference can hardly be seen by bare eyes, you only need to re-download this gallery if you are super hardcore on quality.
#02 of 2D Dream Doujinshi, the physical version is quite rare, it is actually the limited bonus contents for the launching of "あとみっく文庫 (Atomic Pocketbook/Atomic Bunko)", and considered as normal manga rather than a doujinshi, however it is made into digital version (this one), disguised as "サークルトランポリン (Circle Trampoline)" about one year later. #01 can be found: https://e-hentai.org/g/572001/0595310599/ Unlike it, this one doesn't made into full tank yet, but being serialized on 2D Dream Magazine atm by 天海雪乃 (Amami Yukino) Though the original novel is superior in length, there are 6 volumes produced, first 4 are uploaded by Harupuia: vol.1 https://e-hentai.org/g/484053/bbe3c09507/ vol.2 https://e-hentai.org/g/484056/483a979343/ vol.3 https://e-hentai.org/g/484058/c50f16da4c/ vol.4 https://e-hentai.org/g/484059/c5889015a7/