Oh they change phones few times xD In the Challengers they have funny, big phones. Takanaga Hinako, dunno where, wrote that she was wondering whether give im smartphones, or not.
I think year in this manga is not important.
In this manga is only one "real" event - legalization of same-sex marriages in California. So... 2008? I don't think so ;)
Well actually even as far back as vol.1 ch. 3 they use cellphones they're flip phones though
Also if you're referring to this--> http://www.mangago.me/read-manga/koisuru_boukun/mh/v01/c001/5/ this can't be used to determine the timeline because I don't know if it's a mistake in translation or a misunderstanding on Takanaga's part but gay marriage wasn't legalized in Los Angeles until 2008 by then there were smartphones already... The 2004 would make sense in they said San Francisco though...
In the original it's said San Francisco (also in the anime is mentioned San Francisco and not Los Angeles).
Ah, sorry. 2004, not 2008 :D
I know the anime does...but by original do you the Japanese version? Because both this version and this Spanish version say Los Angeles
Usually in long-running manga they have this problem..
The story begins in 2005, you see? Morinaga and senpai were using landline phones to communicate with each other.
In recent chapter, it was revealed that only 9 months had passed in the manga.
Now, we see Senpai having a smartphone. What year is it in the manga, actually?