doujinshi : Rider-San To No Ichinichi. (Fate/Stay Night) [Yanagi]
Rider-san to no Ichinichi. (Fate/stay night) [Yanagi]
/r/doujinshi - hentai with a storyline
original: https://reddit.com/r/doujinshi/comments/blrh5i/ridersan_to_no_ichinichi_fatestay_night_yanagi/