Ore to Hero to Magical Girl

I ordered volume 1 of Ore to Hero to Magical Girl online, as suggested by Sogou0111. Buying it online on Mangaoh made me nervous at first, since the website is mostly in Japanese, but things worked out great. They even sent an extra freebie (though I was hoping for a sticker set too).

Love this manga. Now where can I get a phone case that looks like the main character's phone?