Update! I found someone selling the entire set on eBay and it was in English! But the price is a bit high. So I asked the seller where they got the mangas from and they told me junemanga.com so I checked it out and the prices were really low, but they are currently out of stock and a lot of the series is unavailable or sold out. Sooo... I managed to find the series in English but I either have to pay way extra for the complete series or wait til the website has more copies available, which I don't know when that will be.