Well, it's time to dig once more into my inordinately large pile of bad BL and fish out another example to take to task, and this one even manages to tie into the fact that I'm posting this on Father's Day.
KIREPAPA, by Ryo Tanagi. First published in 2003 and first published in North America in 2009.
PLOT:
Chisato is a single father who is beyond overprotective. He fears that every boy that comes into the life of his innocent, waifish son Riju will try to assault him, so Chisato routinely scares away his son's classmates with harsh words and the occasional laxative-spiked snack. The only boy he hasn't been able to detour is Shunsuke. Things only get worse when he discovers that this annoying teen boy also moonlights as a novelist, one that Chisato has admired for years. Can Chisato come to terms with this revelation and his own changing feelings for Shunsuke?