http://www.mangago.zone/read-manga/dalkomhan_namja/
have you read this? there's so much character development, both manly and independent/protective of each other a few chapters in.
maybe not exactly what you're looking for but these are some others I've enjoyed:
(not weak characters/storyline etc)
dream away
the best smell
honto yajuu
hanakoi tsurane
my dearest cop
blue sky complex
serious joke
love tractor
all of you
rix vanus (super cute characters and interesting storyline but the MC gets attempted rape/forced way too often by random characters, not his love interest)
As the title says, please recommend me some manga like At the end of the road. Not necessarily same plot, but the characters. Both seme and uke are strong/manly kind of type. Thank you in advance
ヾ(❀╹◡╹)ノ~