Hakkou Omedetou Gozaimasu <3
Congratulations on your publication
Kono ROSUKE ga!!
This "rosuke"/"losuke" (written in Katakana, a name? I think it's just someone yelling in frustration/anger)
"H" janakute gomen ne
kitanakute sumandesune
I'm sorry it's not "h" (hentai)
Please excuse the mess or I'm sorry it's messy (I think is what the last means)
My Japanese is getting rusty.
