I'll include the link here but keep in mind it's in Spanish, though a little Google translate fixed that. Figured anyone who wanted to read more of their story could have a go, but it's so cute! https://visortmo.com/library/manga/38441/fubinna-ore-to-kuzu-ouji



So... Matthew is colorblind? I'm trying to think if anywhere else in the work we were given hints about it other than the last chapter... Cause that totally took me outta left field... Can anyone else think of anything?
I think the author mentioned it on twitter or something because usually when world building not everything makes it to the story but is relevant in the universe. It’s not mentioned in the story directly that Matthew sees red as green, so he metaphorically confuses the red flag Jin is as a green one. So if you didn’t know it doesn’t take from the story but it adds to the metaphor of the title.
Yes there were subtle hints direct and metaphorically both here and there
In initial episode matthew was told by coffee shop owner to cross road safely, the panels go dark green shades might be matthew pov with the exit sign being green and the title itself might suggest in metaphorically way.
Traffic lights and crossing road were subtle hints, matthew was carrying unconscious jin to hospital in rain, they showed the traffic signal like he couldn't catch and understand it, when jin was shot in ending of season 1 , matthew doesn't get it right away that it was jins red blood. You might find some hints in second reading that was missed
Wish they explored this more!!