Oda Kazumasa's theme song for this drama "Kira Kira" which literally translates into "Sparkling", has a rather uplifting melody and very encouraging words about someone who promises to bring his lover along in his journey to pursue a dream ahead and how thankful he is for the lover's presence all this while. That seems to coincide with the situation in the drama where Tsutsumi's character manages to achieve success in his career, thanks to the support of Fukatsu's character. What also makes this song special is the fact that it was Oda's first drama theme song in 11 years since 1991's "Tokyo Love Story". It was rare that big names like Oda would sing drama theme songs by the time we got to the 2000s so having a song of his to be the theme mattered a lot in terms of catching people's attention. At the same time, the success of this single also helped in Oda's music career because his albums released before "Kira Kira" all achieved rankings within the Top 10 but his singles except one in 1995 did not manage to do the same. After "Kira Kira", Oda achieved a consecutive run of 8 singles which made it into the Top 10 charts and also boosted his album sales to a great extent. Goes to show how a good theme song can be mutually beneficial for the singer and the TV station producing the drama.
If you are keen to hear this song, please view the PV here.