Song : Hed Pon Keu Ruk Tur (The reason is...loving you.)
Singer : Mos (Patiparn Pataweekarn)
Taken from Sleepless Society Vol.2 Concert VCD, filmed on December 16, 2006.
Mos just left the monkhood when doing this show. The song he sang, Hed Pon Keu Ruk Tur is the OST to the drama, "Ruk Harm Promote" (Concealed Love), starring himself and Pim (ZaZa), from 2002.