I'm wondering, if you can answer, do you have some certain site from which you can order Kou-sensei manga? And i'm also wondering is there any chance to order iHertz somewhere? QwQ
You can find them on CD Japan : http://www.cdjapan.co.jp/products?q=yoneda+kou They also sell the iHertz magazine (here), though you better keep your eyes on it to be sure not to miss them as they often goes out of stock quickly (or at least that’s what happened twice to me)
You can also order from Honto : http://honto.jp/It’s a japanese only website, but they ship internationally, and their shipping fees aren’t too expensive if my memory doesn’t fail me. I used to order from them all my mags and manga, until my card became unusable for unknown reasons…
I hope it helped.