lol, I'd love to see an Ako x Sera doujin, yeah.  This one's a pretty good start as the first Awai x Shizu I can recall reading.
Ryuuka and Toki not having started dating yet in this storyline was kinda unexpected, though.  lol, the author totally left me hanging with that last development.  I like this guy's Saki doujins, I hope they produce more.