"I think the amateurishness fits this song perfectly."
This comment that I saw under the video for "Bobby ni Kataomoi" (Having a Crush on Bobby) by actress/aidoru Satomi Tezuka（手塚理美）is a good one, and most likely fits many an aidoru tune. Teenage love expressed by Japanese teenagers in a giddy way? Yup, a prime example is here. Nope, the singing isn't on Hiromi Iwasaki's（岩崎宏美）level at all but that's fine here since it's the story of a callow young girl's expression of one-way love in her own voice, something that a lot of listeners can relate to.
Moreover, the theory of not-so-great singers being elevated by some great songwriters can come into play here. "Bobby ni Kataomoi" was written by Takashi Matsumoto（松本隆）and composed by Yumi Matsutoya（松任谷由実）, and as soon as I heard the melody through the arrangement by Ichizo Seo（瀬尾一三）, I could peg it as a Yuming-penned number. There is that New Music flavour of the 1950s/1960s teenage idol pop with images of young Satomi surrounded by pink hearts while she savors a photo of this fellow Bobby in her bedroom.