Works by pixiv artist Yamachan, who is so involved now that I have to get an archive of his work somewhere.

pixiv - https://www.pixiv.net/en/users/7885860

twitter - https://twitter.com/yamanch1001

https://robypoo.blogspot.com/ for updates

vol. I: here
vol. II: https://e-hentai.org/g/2908738/60362840d7/

https://e-hentai.org/s/9e8e787334/2851591-622 - The character on the left, Reika, belongs to ago (https://e-hentai.org/s/f6c51f875e/2279890-377)

https://e-hentai.org/s/d2487bc252/2851591-883 - The character on the right, Mio Huruta, belongs to Hittaito (https://e-hentai.org/s/bb68b64f3d/2783903-79 )

https://e-hentai.org/s/00b8f99a43/2851591-884 - From left to right, Maria belongs to Hasu and Minori belongs to Debris (https://e-hentai.org/s/80a61a98c4/2859257-593 , https://e-hentai.org/s/3b60b83080/2020402-376 )

https://e-hentai.org/s/d55705573e/2851591-886 - From left to right, Ikuno Harada belongs to Crayworks and Mikoto Kanagi belongs to Yuuyu (https://e-hentai.org/s/ea46f6a9dd/2859253-10 , https://e-hentai.org/s/61e63ca52b/2797709-36 )

https://e-hentai.org/s/a499f99718/2851591-887 - From left to right, Karin Arawa belongs to puretama and Nemu belongs to KKno (https://e-hentai.org/s/bde593a725/2552360-1284 , https://e-hentai.org/s/fd384a6757/2781263-240 )

https://e-hentai.org/s/804b4683e6/2851591-888 - From left to right, Yayoi Kurosame belongs to kuronodo and Sakura Yae belongs to PTB (https://e-hentai.org/s/ddc9a9736a/2295713-542 , https://e-hentai.org/s/59dfe0580b/2851587-1 )

https://e-hentai.org/s/fa73b41cfe/2851591-1160 - The character on the right, Tsukasa Sawaya, belongs to BEBE (https://e-hentai.org/s/f99614fb59/2304794-837 )

https://e-hentai.org/s/9bb7cc55c1/2851591-1343 - The character on the right, Ren, belongs to Hasu (https://e-hentai.org/s/e00305c11e/2859257-359 )

https://e-hentai.org/s/1840eeafde/2851591-1346 - The characters on the right of Ren, including Rena and Maria, all belong to Hasu (https://e-hentai.org/s/2a03e4d636/2839044-1 )

https://e-hentai.org/s/7ee76654f1/2851591-1355 - Sakura Yae returns, alongside her little sister Kaede Yae (https://e-hentai.org/s/43c4fa4e3b/2851587-28 )

https://e-hentai.org/s/d694476447/2851591-1409 - Reika returns

https://e-hentai.org/s/7e961444e9/2851591-1430 - Several characters return