ch2 p37 - very clever to consider it a Johnny's reference but i don't think it's that deep. since the reference is not a name of an idol and rather lingo within fans, the likelihood of hoshi being a fan and knowing is very slim. i think he just thought it was cute because "fuku" is a common pet name and adding "tan" at the end is a cutesy way to address someone
ch2 p37 - very clever to consider it a Johnny's reference but i don't think it's that deep.
since the reference is not a name of an idol and rather lingo within fans, the likelihood of hoshi being a fan and knowing is very slim. i think he just thought it was cute because "fuku" is a common pet name and adding "tan" at the end is a cutesy way to address someone