Nope, it's not Akamatsu's. Ken Akamatsu has a very distinct style, and his work is usually easily recognisable. I remeber reading some doujin by Culittle, and immediatly thinking "hey, this is drawn by the same guy as Love Hina". But both Akamatsu's and this manga author's best known works are actually really similar.
Besides I don't think Hito Natsu no Kids Game was ever released in english in any way.