Been looking all over for this game in english. There's some sort of copy protection but seeing as it uses euchully's engine or whatnot it shouldn't be that difficult to circumvent.
Shine, could you update this one later in the day? The sheer amount of bugs are so astounding, it's unplayable. Just the first update alone, already fixed lots of them. The devs said that he'll update it again within the day. 星天の魔女 to v25.05.06 (debugging in progress)