an Entity references as follows:
"Waratchaō yo Boyfriend" (笑っちゃおうよ BOYFRIEND, Waratchaō yo Bōifurendo, Let's Laugh, Boyfriend) is the 11th single of the all-girl J-pop group Berryz Kobo, released on August 2, 2006. The single ranked 15th in the Oricon Weekly Singles Chart.