"Sekai debut" for Onkalo has happened! Eiko's concert site put up a link to buy the actual, physical CD (and here I thought they were plotting a digital release). For anyone interested,
you can purchase the single here. The site can be viewed in English, looks pretty legit and the price doesn't seem too awful either, seeing as it contains shipping and all. I really want to buy the single, myself, since I really loved the title song and they've made it so easy.