A little backstory about Koisuru Boukun's origin manga, Challengers.
Koisuru Boukun is a spin off of Takanaga's debut work, Challengers. The first volume was originally called Goukaku Kigan (Prayers for a passing grade) and started being published in a magazine called Hanamaru manga in 1995. Subsequent volumes were published under the title Challengers and that has become what the series is known by. The main character was Souichi's little brother, Tomoe, and it was about his romance with an older salaryman named Kurokawa that he met in Tokyo when he went to college.
But in 1999, Hakusensha (the publishing company) kept the magazine title but changed it to a shoujo magazine and canceled everything that had been published in that magazine previously. The Challengers series was dead in the water for 5 years until Kaiousha (a different publishing company) ended up saving Souichi and Morinaga's story from publishing hell. Takanaga Hinako really wanted to continue Souichi and Morinaga's story and was even planning on just continuing it as a doujin if it couldn't get picked up by another publisher because of the copyright issues. She ended up pivoting away from the rest of the original Challenger's characters even though she had still had plans for the original characters at the time it was canceled. I'm a little sad about that because we'll probably never see Reiko again and the plot with her and Souichi was funny lol....
Even 20 years later, with Koisuru Boukun being the better known series, they still publish it as part of the "Challenger's series". (Highlighted in pink here)
So, Morinaga and Souichi's story really started in Challengers and if you haven't read it before you really should go back and read it for the backstory. There's more comedy, less porn, and it's very 90s.
The Challenger's story abruptly cut off after Tomoe and Kurokawa moved to America. Volume 4 of the manga never even got published. It was lost media until Kaiousha finally saved it in 2004 and they reprinted all of the Challenger's volumes under their imprint and they added an exclusive extra story to the 4th volume showing Souichi finding out that Kurokawa had moved to America with Tomoe and Tomoe had lied to him about it.
Happy 30th anniversary Takanaga Hinako!
Thank you for Koisuru Boukun <3
