This and post #351348, post #351349, and post #362782 are not done by qp:flapper, but some no name artists imitating their style. qp:flapper only did character design and some concept/promo illustrations, not every image in this game is drawn by them. You can tell from the coloring. Please don't tag them with qp:flapper.

yes,
...and each ilustrations in this game done by 4 artists.
sketcher, lineart artist, coloring artist, and background artist.
the company usually pick up random artists from pixiv. _(:3 」∠)_