#01: "Life is Like a Boat" by Rie Fu (eps 1-13) #02: "Thank You!!" by HOME MADE KAZOKU (eps 14-25) #03: "Houkiboshi" (ほうき星; "Comet") by Younha (eps 26-38) #04: "happypeople" by Skoop on Somebody (eps 39-51) ...