This is a doujinshi (fan-made comic) of Kantai Collection (Kancolle) purchased at a sales event. The "Gunkan on the Hill" one is particularly good (serious) and I recommend it. "Dairokude Nudo Dessan" has a lot of skin color, but it is not for adults. For sale as is, no price reduction. ※ No adult content. Comiket Kancolle