Kiss on the cheek

This is before Palamon and Mina were dating (a while after her break up with Falco [link]). Mina had been receiving flowers and some poetry from a "Secret Admirer" but she had no idea that it was Palamon. One night Mina and the Scire Club snuck out of Alfea to go to Telepthion (Mina's home planet) to help a friend out, Palamon provided the transportation. Mina kissed his cheek to thank him and he was really happy (actually he looks kind of insanely happy here, but whatever), later Désirée said that she shouldn't have. That was when Mina found out who her secret admirer was.
Total background fail multiple times, so I gave up and went for transparency.