No. Definitely not Hentai. This is actually an anime/manga titled Hetalia: Axis Powers and comedy in nature Hetalia - a word play between hetare and Italia (Italy)
I'm an otaku but I haven't watched hetalia,and btw if u were obsessed with manga or anime you'd be a weeaboo
Weeaboo is what we call people who are obsessed with anime/manga,fantasize over it and like to use words like kawaii(cute) in sentences spoken in English,etc