Oh dear me, this manga is killing me!! I honestly don't know what to root for, the couple is cute but the age gap is enormous... And that "rival" thing... Oh god, I'm so curious.
Kinda looks like a crossover between two Ogeretsu Tanaka story, but I think it's enjoyable, though you can already predict how everything will turn out.
Does... does this mean... that besides these nice extras we are going to see also the other chapters?? ... No, uh?
T____T