This where originaly two diferent posts:
Page 1 to 5: ふたなりのおもちゃ / Futanari no omocha
Page 6 to 10: ふたなりに敗北する話 / Futanari ni haiboku suru hanashi

Artist:
https://www.pixiv.net/en/users/28514960
https://twitter.com/odoru_london
https://skeb.jp/@odoru_london
http://odorulondon.fanbox.cc
https://fantia.jp/fanclubs/13847
https://ci-en.dlsite.com/creator/15125

Looks like kassai's art style.

Base +15

That's because it's the same person.

Base +7

喂喂喂喂喂！灵感菇力！菇力！菇力！我擦灵感菇🤓

Base +1, 博丽•霊梦 +5

English:
https://e-hentai.org/g/3571100/f03f30c654/#cnew

Base +10