Firstly, Go to the official site (https://kaguya.love/).
Secondly, you will find this.
アイコン is “icon”, 壁紙 is “Wallpaper”.
Lastly, click “download” to get the icon
or click “1920×1080” “1280×1024” “1125×2001” “1536×2048”
for your computer or smartphone, etc.
Kaguya-sama wa Kokurasetai, aka Kaguya-sama Love is War, is a romantic and comedic manga written and illustrated by Aka Akasaka.
The work firstly had been serialized from the issue of June 2015 to February 2016 in Miracle Jump, after that, has been serialized in Weekly Young Jump since the issue of No. 17 2016.
The 10th volume that released on June 19, 2018 revealed with its book band that
the work has soled over 2.4 million copies in total.
The manga has received two spin-off manga by different artists in 2018.
Kaguya-sama wa Kokurasetai Two Spin-Off Manga;
Kaguya-sama wo Kataritai (Lit; We want to talk about Kaguya-sama),
Kaguya-sama wa Kokurasetai Doujin-ban.
— BUSHIDO (@BlackDragonSP) June 8, 2018
The work has received TV anime adaptation in 2018.
Via – TV Anime Official Site
Via – Official Twitter Account