What manga is this? http://www.mangago.me/read-manga/kyokutou_no_hanamuko/an/kyokutou-no-hanamuko-chapter-2.html/2/
It says "Wallpaper by S(B?)ygnus" (bottom left); maybe you could acquire further information at Attractive fascinante's site?
The artist is maybe Kanzaki Takashi, but I'm not sure.
What manga is this?
http://www.mangago.me/read-manga/kyokutou_no_hanamuko/an/kyokutou-no-hanamuko-chapter-2.html/2/