Sensitive & Thickheaded Episode 7

Unable to believe that Kei is in love with her, Hikari behaves strangely around Kei after Yahiro's party and refuses to tell him why. To determine where the S.A will go for their vacation, Kei suggests a contest where the winner decides - with the condition that if he wins, Hikari will tell him what Yahiro said to her at the party.