These are the background and system graphics from Low Spec.
Images smaller than 100x100 were thrown together for the gallery, but are separate in the DDL.

DDL: https://mega.nz/#!p1kChD6R!oJ0R14eTV-hP8PcuRvAzHerlXg6VfgHvGIbZ_axzHWY (88.1 MB, 97.4 MB unpacked)

The DDL is a 7z with LZMA2 compression, in case you're having issues extracting it.

Getchu - http://www.getchu.com/soft.phtml?id=888542

DL Getchu - http://dl.getchu.com/index.php?action=gdSoft&gcd=179958

Erogamescape - https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=22656

DL site -http://www.dlsite.com/pro/work/=/product_id/VJ010507.html/

DiGiket - http://www.digiket.com/work/show/_data/ID=ITM0147915/

Gyutto - http://gyutto.com/i/item179958

Holyseal - http://holyseal.net/cgi-bin/mlistview.cgi?prdcode=13452

Comshop - http://www.comshop.ne.jp/items/item-302769.html

DMM - http://dlsoft.dmm.co.jp/detail/vsat_0210/

DMM - http://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1439apc11506/

Melonbooks DL - http://www.melonbooks.com/index.php?main_page=product_info&products_id=IT0000192001

Melonbooks - https://www.melonbooks.co.jp/detail/detail.php?product_id=172496

Game OHP - http://hamham.sc/LS/

Artist - Shitou (紫刀)
Artist - Kurasuke (くらすけ)
Artist - Huei Nazuki (風瑛 なづき)

Event CG

Part 01 - https://e-hentai.org/g/1023465/6984789afe/
Part 02 - https://e-hentai.org/g/1023588/deb60eb8da/
Part 03 - https://e-hentai.org/g/1023639/dcbfe0497d/
Part 04 - https://e-hentai.org/g/1023921/e95192330a/
Part 05 - https://e-hentai.org/g/1023972/2a3002f7fd/
Part 06 - https://e-hentai.org/g/1024019/d46b408113/
Part 07 - https://e-hentai.org/g/1024081/85aac03689/
Part 08 - https://e-hentai.org/g/1024359/2e3b3bc608/
Part 09 - https://e-hentai.org/g/1024425/eb3f6d7fac/
Part 10 - https://e-hentai.org/g/1024446/4c460dde7d/

Chart CG

Part 1 -https://e-hentai.org/g/1024456/32efa94214/
Part 2 -https://e-hentai.org/g/1024495/73f52bf00c/

SLG Mode - https://e-hentai.org/g/1024448/c367ef7a78/

Base +40