sesang-en sumanh-eun apeum-i iss-eo geu sog-e neoleul dul suneun eobs-eo oh majuchin du nun-e damgyeojin neo-ui halu gadeughi us-eum-i meomchuji anhge haneun geos-i amado nae so-won-ilji molla I'm your happy virus neo-ui us-eum-i naegen geu mu-eosboda sojunghani-kka I'll be there for you muneojilyeo handaedo gwaenchanh-a neul geulaessdeus Smile smile smile jichyeo sseuleojil ttaedo geogjeong ma neul geulaessdeus usja usja usja I'm your happy virus neo uljima seulpeujanh-a naega daesin apeul sun eobs-eulkka maju jab-eun du son-e namgyeodun uli halu gadeughi us-eum-i meomchuji anhge hadolog yagsoghalge ap-eulodo yeong-wonhi I'm your happy virus neo-ui us-eum-i naegen geu mu-eosboda sojunghani-kka I'll be there for you muneojilyeo handaedo gwaenchanh-a neul geulaessdeus Smile smile smile jichyeo sseuleojil ttaedo geogjeong ma neul geulaessdeus usja usja usja naega neo-ui misoga doegopeun i-yu naleul usge mandeun neo-ui salang geu-ppun-i-ya muneojilyeo handaedo gwaenchanh-a neul geulaessdeus Smile smile smile byeonham-eobs-i jigeumcheoleom neo-ui yeop-eul yagsoghalge ojig neo-ui Happy happy virus