As the mangaka explains. It's amusing and once again, I got reminded that Shoui is the clan head. He's grown into such a splendid man. The simple wish of wanting to see Moriya play turned into a drinking contest when the playful kami Asari invited his most favourite Himi. Poor Ryuusei is stuck in the middle hoping that his cranky guardian Genma will not snap. Main focus here is the Shoui x Asari pair.
Ze Dear+ 2012 Extra