Sho cannot reveal anything to Yuna hr at her insistent as her kokoro is open to him; she wishes the same of sho. Yuna just wanted Sho to say something abt ji yon who came by to let out the undercover of Sho. Sho replied "Gomen" being nothing to say to her and begged her to "shinji" in their closeness.
Hope the next, we will get to see the couple patching back and openly affectionate twds each other.