Shoboon chapter 8 has been released...
Spoiler for short summary:
It's about Kobato and Maria's fight over Kodaka. Rika then suggest a battle for both of them to decide the winner. An official Fukuen Misato seiyuu joke, "Well then, try to get Kodaka-senpai and be ultra happy!"
First battle is a quiz. The question is what kind of pants Kodaka wears that day. And to check if the lolis answer is true, Rika asks Yukimura to strip Kodaka
Last battle is three-legged race. Kobato and Maria has to run to the top of mountain behind the school where Kodaka and others are waiting.
As expected at first they can't even pass over a step without failing and then they try to work together after they know that the reason they like Kodaka is because Kodaka's kindness. Monitoring them with CCTV, Rika then takes it to another level by exploding a hole between the lolis so they fall. Almost give up, Maria then unties the rope on their leg and tells Kobato to climb on her shoulder as Kobato is Kodaka's true little sister therefore it's only natural for Kobato to go to Kodaka's side. After get out from the hole, Kobato then gives her hand to Maria so she can climb too. Together they run together in synchro, but without the tie, to the place where their beloved onii-chan waits.
In the end Rika retorts that Kodaka is truly a harem king
Maria often calls Kobato Leysushi on Shoboon (later the correct Leysis here) rather than the usual 'poop vampire', and Kobato calls her Maria for the first time; well, she calls him 'churchwoman Maria' though, but still... :3