Resized to 33% of original (view original)
Artist's commentary
"New Book in C105" BRILLANTE
12/29 Comiket 105 East 1 Hall I-06b "Ryuseigun"
"Melonbooks"
https://www.melonbooks.co.jp/detail/detail.php?product_id=2695415
"BRILLANTE" JIS B5 portrait / 16 pages / Full Color / Event Pricing 500 yen
This is an illustration book of Misono Mika of Blue Archive.