Parallel Paradise

Story:

"My name is Youta Tada, I'm the most ordinary Japanese schoolboy. I've been in love with my childhood friend for a long time, but I don't have the strength to tell her. And then I'm killed. Oh. And then I wake up in a parallel world. Wow, two moons, purple sky, dragons – what a beauty! And a girl. A girl knight. Wait, why is she responding so strangely to my voice? What's–what's flowing in there? What-oh-oh-oh-oh-oh?!"