Sakaki Kayumu https://www.pixiv.net/member.php?id=5577238

Also known as 127okayu and sakaki127

Hidamari Sketch Anthology Comic ch14: Hidamari Et Cetera *Midnight Party* Hidamari Sketch Doujin released Apr 7 '14 4-koma Comedy
Hidamari Sketch Anthology Comic ch10.5 Hidamari Sketch Doujin released Sep 1 '14 Comedy
Secret Borderline Love Live! Doujin released Jul 22 '22 Kotori x Nico Yuri
Secret Weekend 2 Love Live! Doujin released Jul 22 '23 Kotori x Nico Sequel Yuri
Secret Weekend 1 Love Live! Doujin released Jul 22 '23 Aaaaaangst Kotori x Nico Yuri