Hey guise, I've got this idea.
How about we convince 4 Leaf Studies to make an anime series.
On each season, Hisao would date a different girl. Shoud look like this:
-Season 1: Hisao enters Yamaku
-Season 2-6: Dating different girls
-Season 7 (last season): Hisao is not satisfied with girls anymore. Discovers his manly personality and interests. Starts dating Kenji.
Girls fans won't get upset. As no girl wins.
And there shall be a manly wedding.