Translations:Th155/Marisa's Scenario/95 koishi/en

 But we know who's gonna show up, right? The Prismrivers With H, right?  We can't miss this! You're gonna regret it! ソンソン (sonson) = 損損, ソン is from ハドソン (Hudson) The slogan itself is transformed from a famous Awa Dance singing "踊る阿呆に見る阿呆 同じ阿呆なら 踊らにゃ損々(your loss if you don't dance)"
 * note= Based on an old ad slogan by Hudson Soft "買わなきゃソンソン！", "Buy it or regret it!".